diff --git a/asm/include/main_0200C4CC.inc b/asm/include/main_0200C4CC.inc
index cf7f1fc6..dc87c2b0 100644
--- a/asm/include/main_0200C4CC.inc
+++ b/asm/include/main_0200C4CC.inc
@@ -772,8 +772,8 @@
 .public CLIENT_LEVEL_TABLE
 .public COLLECTION_MENU_DEFAULT_WINDOW_PARAMS
 .public CONTROLS_CHART_DEFAULT_WINDOW_PARAMS
-.public DataTransferInit
-.public DataTransferStop
+.public FileRom_InitDataTransfer
+.public FileRom_StopDataTransfer
 .public DEBUG_MENU_DEFAULT_WINDOW_PARAMS
 .public Debug_Print
 .public Debug_Print0
@@ -801,10 +801,10 @@
 .public FemaleToMaleForm
 .public FileClose
 .public FileGetSize
-.public FileInitVeneer
-.public FileOpen
-.public FileRead
-.public FileSeek
+.public FileRom_Veneer_FileInit
+.public FileRom_HandleOpen
+.public FileRom_HandleRead
+.public FileRom_HandleSeek
 .public FORBIDDEN_FORGOT_MOVE_LIST
 .public GAME_MODE
 .public GET_ITEM_NAME_FORMATTED_SPRINTF
diff --git a/asm/include/overlay_11.inc b/asm/include/overlay_11.inc
index 6004a90b..e7a4a1c2 100644
--- a/asm/include/overlay_11.inc
+++ b/asm/include/overlay_11.inc
@@ -54,8 +54,8 @@
 .public CreateSimpleMenu
 .public CreateSimpleMenuFromStringIds
 .public CreateTextBox
-.public DataTransferInit
-.public DataTransferStop
+.public FileRom_InitDataTransfer
+.public FileRom_StopDataTransfer
 .public Debug_Print
 .public Debug_Print0
 .public DecompressAtNormalVeneer
@@ -76,10 +76,10 @@
 .public Debug_FatalError
 .public FemaleToMaleForm
 .public FileClose
-.public FileInitVeneer
-.public FileOpen
-.public FileRead
-.public FileSeek
+.public FileRom_Veneer_FileInit
+.public FileRom_HandleOpen
+.public FileRom_HandleRead
+.public FileRom_HandleSeek
 .public FreeTeamStats
 .public GenerateDailyMissions
 .public GenerateKecleonItems1
diff --git a/asm/main_02000C6C.s b/asm/main_02000C6C.s
index fadeba5b..e92bbcb5 100644
--- a/asm/main_02000C6C.s
+++ b/asm/main_02000C6C.s
@@ -4375,7 +4375,7 @@ _020041A4:
 	str r2, [sp, #0xc]
 	bl Debug_FatalError
 _020041C4:
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	bl sub_0207A324
 	bl sub_0207A270
 	cmp r4, #0x24
@@ -4798,7 +4798,7 @@ _020047A0:
 _020047B8:
 	add r0, sp, #0x10
 	bl InitOverlay
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 _020047C4:
 	add sp, sp, #0x3c
 	ldmia sp!, {r3, r4, pc}
@@ -4927,7 +4927,7 @@ _02004968:
 	str r2, [sp, #0xc]
 	bl Debug_FatalError
 _02004988:
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	cmp r4, #0x24
 	addls pc, pc, r4, lsl #2
 	b _02004EAC
@@ -5303,7 +5303,7 @@ _02004EAC:
 	str r2, [sp, #4]
 	bl Debug_FatalError
 _02004ECC:
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 _02004ED0:
 	add sp, sp, #0x10
 	ldmia sp!, {r4, pc}
@@ -8349,7 +8349,7 @@ sub_020075F4: ; 0x020075F4
 	stmdb sp!, {r3, r4, r5, lr}
 	mov r5, r0
 	mov r4, r1
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	mov r0, #2
 	str r0, [r5]
 	ldmia r5!, {r0, r1, r2, r3}
@@ -8371,7 +8371,7 @@ sub_02007624: ; 0x02007624
 	stmia ip!, {r0, r1, r2, r3}
 	ldmia lr, {r0, r1, r2}
 	stmia ip, {r0, r1, r2}
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, #1
 	ldmia sp!, {r3, pc}
 	arm_func_end sub_02007624
@@ -9218,8 +9218,8 @@ _02008160:
 	ldmia sp!, {r3, pc}
 	arm_func_end sub_02008138
 
-	arm_func_start DataTransferInit
-DataTransferInit: ; 0x02008168
+	arm_func_start FileRom_InitDataTransfer
+FileRom_InitDataTransfer: ; 0x02008168
 	stmdb sp!, {r3, lr}
 	ldr r0, _0200818C ; =_020AF368
 	bl sub_02002CB4
@@ -9232,10 +9232,10 @@ DataTransferInit: ; 0x02008168
 	.align 2, 0
 _0200818C: .word _020AF368
 _02008190: .word _020AF360
-	arm_func_end DataTransferInit
+	arm_func_end FileRom_InitDataTransfer
 
-	arm_func_start DataTransferStop
-DataTransferStop: ; 0x02008194
+	arm_func_start FileRom_StopDataTransfer
+FileRom_StopDataTransfer: ; 0x02008194
 	stmdb sp!, {r4, lr}
 	ldr r1, _020081C0 ; =_020AF360
 	ldr r0, _020081C4 ; =_020AF368
@@ -9250,7 +9250,7 @@ DataTransferStop: ; 0x02008194
 	.align 2, 0
 _020081C0: .word _020AF360
 _020081C4: .word _020AF368
-	arm_func_end DataTransferStop
+	arm_func_end FileRom_StopDataTransfer
 
 	arm_func_start sub_020081C8
 sub_020081C8: ; 0x020081C8
@@ -9282,16 +9282,16 @@ _020081FC: .word sub_02002E10
 _02008200: .word _020AF368
 	arm_func_end sub_020081F0
 
-	arm_func_start FileInitVeneer
-FileInitVeneer: ; 0x02008204
+	arm_func_start FileRom_Veneer_FileInit
+FileRom_Veneer_FileInit: ; 0x02008204
 	ldr ip, _0200820C ; =FileInit
 	bx ip
 	.align 2, 0
 _0200820C: .word FileInit
-	arm_func_end FileInitVeneer
+	arm_func_end FileRom_Veneer_FileInit
 
-	arm_func_start FileOpen
-FileOpen: ; 0x02008210
+	arm_func_start FileRom_HandleOpen
+FileRom_HandleOpen: ; 0x02008210
 	stmdb sp!, {r4, r5, r6, lr}
 	mov r6, r0
 	mov r5, r1
@@ -9305,7 +9305,7 @@ _02008220:
 	mov r0, r4
 	bl CardPullOutWithStatus
 	b _02008220
-	arm_func_end FileOpen
+	arm_func_end FileRom_HandleOpen
 
 	arm_func_start sub_02008240
 sub_02008240: ; 0x02008240
@@ -9320,8 +9320,8 @@ FileGetSize: ; 0x02008244
 	bx lr
 	arm_func_end FileGetSize
 
-	arm_func_start FileRead
-FileRead: ; 0x02008254
+	arm_func_start FileRom_HandleRead
+FileRom_HandleRead: ; 0x02008254
 	stmdb sp!, {r4, r5, r6, r7, r8, lr}
 	mov r8, r0
 	mov r7, r1
@@ -9345,10 +9345,10 @@ _02008298:
 	bgt _02008270
 	mov r0, r5
 	ldmia sp!, {r4, r5, r6, r7, r8, pc}
-	arm_func_end FileRead
+	arm_func_end FileRom_HandleRead
 
-	arm_func_start FileSeek
-FileSeek: ; 0x020082A8
+	arm_func_start FileRom_HandleSeek
+FileRom_HandleSeek: ; 0x020082A8
 	stmdb sp!, {r3, lr}
 	bl sub_0207F828
 	cmp r0, #0
@@ -9356,7 +9356,7 @@ FileSeek: ; 0x020082A8
 	mov r0, #1
 	bl CardPullOutWithStatus
 	ldmia sp!, {r3, pc}
-	arm_func_end FileSeek
+	arm_func_end FileRom_HandleSeek
 
 	arm_func_start FileClose
 FileClose: ; 0x020082C4
diff --git a/asm/main_0200C4CC.s b/asm/main_0200C4CC.s
index 6c8596f4..dab43820 100644
--- a/asm/main_0200C4CC.s
+++ b/asm/main_0200C4CC.s
@@ -16806,12 +16806,12 @@ sub_02019314: ; 0x02019314
 	sub sp, sp, #0x48
 	mov r5, r0
 	mov r4, r1
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	add r0, sp, #0
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	add r0, sp, #0
 	mov r1, r4
-	bl FileOpen
+	bl FileRom_HandleOpen
 	add r0, sp, #0
 	bl FileGetSize
 	str r0, [r5, #4]
@@ -16823,11 +16823,11 @@ sub_02019314: ; 0x02019314
 	str r0, [r5]
 	add r0, sp, #0
 	ldmia r5, {r1, r2}
-	bl FileRead
+	bl FileRom_HandleRead
 	mov r4, r0
 	add r0, sp, #0
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, r4
 	add sp, sp, #0x48
 	ldmia sp!, {r3, r4, r5, pc}
@@ -16841,12 +16841,12 @@ LoadDseFile: ; 0x0201938C
 	sub sp, sp, #0x48
 	mov r5, r0
 	mov r4, r1
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	add r0, sp, #0
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	add r0, sp, #0
 	mov r1, r4
-	bl FileOpen
+	bl FileRom_HandleOpen
 	add r0, sp, #0
 	bl FileGetSize
 	str r0, [r5, #4]
@@ -16858,11 +16858,11 @@ LoadDseFile: ; 0x0201938C
 	str r0, [r5]
 	add r0, sp, #0
 	ldmia r5, {r1, r2}
-	bl FileRead
+	bl FileRom_HandleRead
 	mov r4, r0
 	add r0, sp, #0
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, r4
 	add sp, sp, #0x48
 	ldmia sp!, {r3, r4, r5, pc}
@@ -17316,7 +17316,7 @@ _02019970:
 	str r0, [r1, #0x2c]
 	ldr r0, _02019B00 ; =_020AFB28
 	bl sub_02002E98
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	bl sub_02003AB0
 	ldr r0, _02019B08 ; =_022A4E58
 	ldr r2, [r0, #4]
@@ -17329,7 +17329,7 @@ _02019A5C:
 	bl sub_0206D30C
 	cmp r0, #0
 	bne _02019A5C
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	ldr r0, _02019B00 ; =_020AFB28
 	bl sub_02002CB4
 	ldr r0, _02019B08 ; =_022A4E58
@@ -17662,7 +17662,7 @@ _02019E3C:
 	str r0, [r1, #0x54]
 	ldr r0, _02019FC0 ; =_020AFB28
 	bl sub_02002E98
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	bl sub_02003AB0
 	ldr r0, _02019FC8 ; =_022A4E58
 	ldr r2, [r0, #0xc]
@@ -17675,7 +17675,7 @@ _02019F1C:
 	bl sub_0206D30C
 	cmp r0, #0
 	bne _02019F1C
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	ldr r0, _02019FC0 ; =_020AFB28
 	bl sub_02002CB4
 	ldr r0, _02019FC8 ; =_022A4E58
@@ -32203,28 +32203,28 @@ GetStringFromFile: ; 0x02025788
 	sub sp, sp, #8
 	mov r4, r1
 	mov r5, r0
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	sub r0, r4, #1
 	mov r1, r0, lsl #0x10
 	ldr r0, _020257F8 ; =_022A59C0
 	mov r1, r1, lsr #0xe
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _020257F8 ; =_022A59C0
 	add r1, sp, #0
 	mov r2, #8
-	bl FileRead
+	bl FileRom_HandleRead
 	ldr r1, [sp]
 	ldr r0, _020257F8 ; =_022A59C0
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r3, [sp, #4]
 	ldr r2, [sp]
 	ldr r0, _020257F8 ; =_022A59C0
 	mov r1, r5
 	sub r2, r3, r2
-	bl FileRead
-	bl DataTransferStop
+	bl FileRom_HandleRead
+	bl FileRom_StopDataTransfer
 	add sp, sp, #8
 	ldmia sp!, {r3, r4, r5, pc}
 	.align 2, 0
@@ -32252,7 +32252,7 @@ LoadStringFile: ; 0x02025818
 	ldrsb r0, [r1]
 	cmp r0, r4
 	ldmeqia sp!, {r4, pc}
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	ldr r1, _0202587C ; =_020AFCEC
 	mvn r0, #0
 	ldrsb r1, [r1]
@@ -32264,12 +32264,12 @@ _02025854:
 	ldr r1, _0202587C ; =_020AFCEC
 	ldr r0, _02025880 ; =_022A59C0
 	strb r4, [r1]
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	ldr r1, _02025884 ; =_020AFCF0
 	ldr r0, _02025880 ; =_022A59C0
 	ldr r1, [r1, r4, lsl #2]
-	bl FileOpen
-	bl DataTransferStop
+	bl FileRom_HandleOpen
+	bl FileRom_StopDataTransfer
 	ldmia sp!, {r4, pc}
 	.align 2, 0
 _0202587C: .word _020AFCEC
@@ -32347,21 +32347,21 @@ CopyNStringFromId: ; 0x0202590C
 	arm_func_start LoadTblTalk
 LoadTblTalk: ; 0x0202593C
 	stmdb sp!, {r3, lr}
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	ldr r0, _02025980 ; =_022A7A0C
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	ldr r0, _02025980 ; =_022A7A0C
 	ldr r1, _02025984 ; =_0209AAD8
-	bl FileOpen
+	bl FileRom_HandleOpen
 	ldr r0, _02025980 ; =_022A7A0C
 	mov r1, #0x33c
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _02025980 ; =_022A7A0C
 	ldr r1, _02025988 ; =_022A7A08
 	mov r2, #2
-	bl FileRead
-	bl DataTransferStop
+	bl FileRom_HandleRead
+	bl FileRom_StopDataTransfer
 	ldmia sp!, {r3, pc}
 	.align 2, 0
 _02025980: .word _022A7A0C
@@ -32384,21 +32384,21 @@ GetTalkLine: ; 0x0202598C
 	cmp r4, #2
 	moveq r4, #0
 _020259BC:
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	ldr r1, _02025AC8 ; =_022A7A08
 	ldr r0, _02025ACC ; =_022A7A0C
 	ldrsh r1, [r1]
 	mov r2, #0
 	add r1, r1, r6
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _02025ACC ; =_022A7A0C
 	add r1, sp, #0
 	mov r2, #1
-	bl FileRead
+	bl FileRom_HandleRead
 	ldrsb r2, [sp]
 	cmp r2, #0
 	bge _02025A00
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	ldr r0, _02025AD0 ; =0x00003EFD
 	b _02025ABC
 _02025A00:
@@ -32407,26 +32407,26 @@ _02025A00:
 	ldr r0, _02025ACC ; =_022A7A0C
 	mov r1, r1, lsl #1
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _02025ACC ; =_022A7A0C
 	add r1, sp, #2
 	mov r2, #4
-	bl FileRead
+	bl FileRom_HandleRead
 	ldrsh r1, [sp, #2]
 	ldrsh r0, [sp, #4]
 	subs r6, r0, r1
 	bne _02025A44
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	ldr r0, _02025AD0 ; =0x00003EFD
 	b _02025ABC
 _02025A44:
 	ldr r0, _02025ACC ; =_022A7A0C
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _02025ACC ; =_022A7A0C
 	add r1, sp, #6
 	mov r2, r6
-	bl FileRead
+	bl FileRom_HandleRead
 	cmp r4, #1
 	bne _02025A78
 	mov r0, #2
@@ -32441,7 +32441,7 @@ _02025A78:
 	bl RandInt
 	mov r4, r0
 _02025A90:
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	ldr r2, _02025AD4 ; =TBL_TALK_GROUP_STRING_ID_START
 	mov r3, r5, lsl #1
 	add r0, sp, #6
@@ -38348,21 +38348,21 @@ sub_0202A45C: ; 0x0202A45C
 	mov sb, r2
 	mov r8, r3
 	ldr r7, [sp, #0x90]
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	add r0, sp, #0x28
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	ldr r1, _0202A5C0 ; =_020AFDAC
 	add r0, sp, #0x28
 	ldr r1, [r1, sl, lsl #2]
-	bl FileOpen
+	bl FileRom_HandleOpen
 	mov r1, r4, lsl #3
 	add r0, sp, #0x28
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	add r0, sp, #0x28
 	add r1, sp, #8
 	mov r2, #0x10
-	bl FileRead
+	bl FileRom_HandleRead
 	ldr r6, [sp, #8]
 	ldr r1, [sp, #0x10]
 	mov r0, r6
@@ -38378,15 +38378,15 @@ sub_0202A45C: ; 0x0202A45C
 	add r0, sp, #0x28
 	mov r1, r6
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	add r0, sp, #0x28
 	mov r1, r5
 	mov r2, r4
-	bl FileRead
+	bl FileRom_HandleRead
 _0202A504:
 	add r0, sp, #0x28
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	cmp sl, #2
 	ldreq r0, _0202A5C4 ; =_0209AE44
 	add r4, sp, #0x18
@@ -80932,10 +80932,10 @@ CopyProgressInfoFromScratchFrom: ; 0x0204D748
 	arm_func_start InitKaomadoStream
 InitKaomadoStream: ; 0x0204D780
 	stmdb sp!, {r3, lr}
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	ldr r0, _0204D798 ; =_022AB4B0
-	bl FileInitVeneer
-	bl DataTransferStop
+	bl FileRom_Veneer_FileInit
+	bl FileRom_StopDataTransfer
 	ldmia sp!, {r3, pc}
 	.align 2, 0
 _0204D798: .word _022AB4B0
@@ -81051,10 +81051,10 @@ LoadPortrait: ; 0x0204D8BC
 	mov sb, r1
 	ldrsh r7, [sl]
 	ldrsb r8, [sl, #2]
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	ldr r0, _0204DA14 ; =_022AB4B0
 	ldr r1, _0204DA18 ; =KAOMADO_FILEPATH
-	bl FileOpen
+	bl FileRom_HandleOpen
 	mov fp, #0
 	mov r4, fp
 	mov r5, #1
@@ -81067,11 +81067,11 @@ _0204D8F4:
 	ldr r0, _0204DA14 ; =_022AB4B0
 	mov r2, #0
 	sub r7, r7, #0x258
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _0204DA14 ; =_022AB4B0
 	add r1, sp, #0
 	mov r2, #0xc
-	bl FileRead
+	bl FileRom_HandleRead
 	ldr r0, [sp, #4]
 	cmp r0, #0
 	movge r0, #1
@@ -81111,15 +81111,15 @@ _0204D99C:
 	beq _0204D9C8
 	ldr r0, _0204DA14 ; =_022AB4B0
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldr r0, _0204DA14 ; =_022AB4B0
 	mov r1, sb
 	mov r2, r6
-	bl FileRead
+	bl FileRom_HandleRead
 _0204D9C8:
 	ldr r0, _0204DA14 ; =_022AB4B0
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, #1
 	b _0204DA0C
 _0204D9DC:
@@ -81133,7 +81133,7 @@ _0204D9DC:
 	bne _0204D9DC
 	ldr r0, _0204DA14 ; =_022AB4B0
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, #0
 _0204DA0C:
 	add sp, sp, #0xc
diff --git a/asm/overlay_11.s b/asm/overlay_11.s
index e2c9d190..bc22c8bf 100644
--- a/asm/overlay_11.s
+++ b/asm/overlay_11.s
@@ -9491,12 +9491,12 @@ SsbLoad2: ; 0x022E46FC
 	mov r2, r4
 	mov r0, #2
 	bl Debug_Print
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	mov r1, r4
-	bl FileOpen
+	bl FileRom_HandleOpen
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	add r1, sp, #0
 #ifdef EUROPE
@@ -9504,7 +9504,7 @@ SsbLoad2: ; 0x022E46FC
 #else
 	mov r2, #0xc
 #endif
-	bl FileRead
+	bl FileRom_HandleRead
 	ldrh r3, [sp, #4]
 	ldrh r2, [sp, #6]
 	ldr r0, _022E48A8 ; =ov11_02324F70
@@ -9529,7 +9529,7 @@ _022E4790:
 	ldr r1, [r5]
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 	ldrh r0, [sp]
 	cmp r0, #0
 	beq _022E47D4
@@ -9541,7 +9541,7 @@ _022E4790:
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	add r1, r3, r1, lsl #1
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 _022E47D4:
 	ldrh r0, [sp, #2]
 	cmp r0, #0
@@ -9570,14 +9570,14 @@ _022E4814:
 	mov r1, r2, lsl #1
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldrh r2, [sp, #2]
 	ldrh r1, [sp, #4]
 	ldr r3, [r5]
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	add r1, r3, r1, lsl #1
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 	ldr r0, _022E48A8 ; =ov11_02324F70
 	add r1, sp, #0
 	ldrsb r0, [r0]
@@ -9594,11 +9594,11 @@ _022E4814:
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	add r1, r5, r1, lsl #1
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 _022E488C:
 	add r0, sp, #0xc + SSB_LOAD_2_STACK_OFFSET
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, r4
 	add sp, sp, #0x54 + SSB_LOAD_2_STACK_OFFSET
 	ldmia sp!, {r4, r5, pc}
@@ -11159,12 +11159,12 @@ SsbLoad1: ; 0x022E5D50
 	mov r2, r5
 	mov r0, #2
 	bl Debug_Print
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	mov r1, r5
-	bl FileOpen
+	bl FileRom_HandleOpen
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	add r1, sp, #0
 #ifdef EUROPE
@@ -11172,7 +11172,7 @@ SsbLoad1: ; 0x022E5D50
 #else
 	mov r2, #0xc
 #endif
-	bl FileRead
+	bl FileRom_HandleRead
 	ldrh r3, [sp, #4]
 	ldrh r2, [sp, #6]
 	ldr r0, _022E5EF8 ; =ov11_02324F74
@@ -11196,7 +11196,7 @@ _022E5DE0:
 	ldr r1, [r4]
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 	ldrh r0, [sp]
 	cmp r0, #0
 	beq _022E5E24
@@ -11208,7 +11208,7 @@ _022E5DE0:
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	add r1, r3, r1, lsl #1
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 _022E5E24:
 	ldrh r0, [sp, #2]
 	cmp r0, #0
@@ -11237,14 +11237,14 @@ _022E5E64:
 	mov r1, r2, lsl #1
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	ldrh r2, [sp, #2]
 	ldrh r1, [sp, #4]
 	ldr r3, [r4]
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	add r1, r3, r1, lsl #1
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 	ldr r0, _022E5EF8 ; =ov11_02324F74
 	add r1, sp, #0
 	ldrsb r0, [r0, #1]
@@ -11261,11 +11261,11 @@ _022E5E64:
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	add r1, r4, r1, lsl #1
 	mov r2, r2, lsl #1
-	bl FileRead
+	bl FileRom_HandleRead
 _022E5EDC:
 	add r0, sp, #0xc + SSB_LOAD_1_STACK_OFFSET
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	mov r0, #1
 	add sp, sp, #0x54 + SSB_LOAD_1_STACK_OFFSET
 	ldmia sp!, {r4, r5, pc}
@@ -18325,33 +18325,33 @@ LoadBackgroundAttributes: ; 0x022EBB40
 	sub sp, sp, #0x48
 	mov sl, r0
 	mov r4, r1
-	bl DataTransferInit
+	bl FileRom_InitDataTransfer
 	add r0, sp, #0
-	bl FileInitVeneer
+	bl FileRom_Veneer_FileInit
 	ldr r1, _022EBC14 ; =ov11_02320C44
 	add r0, sp, #0
-	bl FileOpen
+	bl FileRom_HandleOpen
 	mov r0, #0x58
 	mul r1, r4, r0
 	add r0, sp, #0
 	mov r2, #0
-	bl FileSeek
+	bl FileRom_HandleSeek
 	add r0, sp, #0
 	mov r1, sl
 	mov r2, #8
-	bl FileRead
+	bl FileRom_HandleRead
 	mov r0, #0
 	strb r0, [sl, #8]
 	add r0, sp, #0
 	add r1, sl, #0xa
 	mov r2, #8
-	bl FileRead
+	bl FileRom_HandleRead
 	mov r0, #0
 	strb r0, [sl, #0x12]
 	add r0, sp, #0
 	add r1, sl, #0x14
 	mov r2, #8
-	bl FileRead
+	bl FileRom_HandleRead
 	mov r8, #0
 	strb r8, [sl, #0x1c]
 	add r6, sl, #0x1e
@@ -18364,7 +18364,7 @@ _022EBBD8:
 	mov r0, r7
 	mov r2, fp
 	add r1, r6, sb
-	bl FileRead
+	bl FileRom_HandleRead
 	add r0, sl, sb
 	add r8, r8, #1
 	strb r5, [r0, #0x26]
@@ -18372,7 +18372,7 @@ _022EBBD8:
 	blt _022EBBD8
 	add r0, sp, #0
 	bl FileClose
-	bl DataTransferStop
+	bl FileRom_StopDataTransfer
 	add sp, sp, #0x48
 	ldmia sp!, {r3, r4, r5, r6, r7, r8, sb, sl, fp, pc}
 	.align 2, 0
diff --git a/include/file_rom.h b/include/file_rom.h
new file mode 100644
index 00000000..b3c67262
--- /dev/null
+++ b/include/file_rom.h
@@ -0,0 +1,14 @@
+#ifndef PMDSKY_FILE_ROM_H
+#define PMDSKY_FILE_ROM_H
+
+#include <file.h>
+
+extern void FileRom_InitDataTransfer(void);
+extern void FileRom_StopDataTransfer(void);
+
+extern void FileRom_Veneer_FileInit(struct file_stream* file);
+extern void FileRom_HandleOpen(struct file_stream* file, const char* filepath);
+extern u32 FileRom_HandleRead(struct file_stream* file, void* buf, u32 size);
+extern void FileRom_HandleSeek(struct file_stream* file, int offset, int whence);
+
+#endif
diff --git a/src/directory_file.c b/src/directory_file.c
index 89114058..695d74ec 100644
--- a/src/directory_file.c
+++ b/src/directory_file.c
@@ -1,12 +1,6 @@
 #include "directory_file.h"
 
-extern void DataTransferInit(void);
-extern void DataTransferStop(void);
-extern void FileSeek(struct file_stream* file, int offset, int whence);
-extern u32 FileRead(struct file_stream* file, void* buf, u32 size);
-extern void FileInitVeneer(struct file_stream* file);
-extern void FileOpen(struct file_stream* file, const char* filepath);
-
+#include "file_rom.h"
 #include "debug.h"
 
 extern void* MemAlloc(u32 len, u32 flags);
@@ -15,18 +9,18 @@ extern char STRING_FILE_DIRECTORY_INIT;
 
 
 void DirectoryFile_ExtractDirectoryFile(struct directory *pack_file, char *file_path) {
-  DataTransferInit();
-  FileInitVeneer(&pack_file->opened_file);
-  FileOpen(&pack_file->opened_file,file_path);
-  FileRead(&pack_file->opened_file,&pack_file->zero,8);
-  FileSeek(&pack_file->opened_file,8,0);
+  FileRom_InitDataTransfer();
+  FileRom_Veneer_FileInit(&pack_file->opened_file);
+  FileRom_HandleOpen(&pack_file->opened_file,file_path);
+  FileRom_HandleRead(&pack_file->opened_file,&pack_file->zero,8);
+  FileRom_HandleSeek(&pack_file->opened_file,8,0);
   u32 toc_total_size = pack_file->nb_entry_table_of_content * sizeof(struct directory_entry);
   struct directory_entry *toc_alloc = (struct directory_entry *) MemAlloc(toc_total_size, 0);
   pack_file->table_of_content = toc_alloc;
-  FileRead(&pack_file->opened_file,pack_file->table_of_content,toc_total_size);
+  FileRom_HandleRead(&pack_file->opened_file,pack_file->table_of_content,toc_total_size);
   Debug_Print0(&STRING_FILE_DIRECTORY_INIT,pack_file->zero,
               pack_file->nb_entry_table_of_content,toc_total_size,file_path);
-  DataTransferStop();
+  FileRom_StopDataTransfer();
   return;
 }
 
@@ -36,10 +30,10 @@ u32 DirectoryFile_GetDirectoryFileSize(struct directory* pack_file, u32 file_ind
 }
 
 u32 DirectoryFile_LoadDirectoryFile(struct directory *pack_file,void *output_buffer,u32 file_index) {
-  DataTransferInit();
+  FileRom_InitDataTransfer();
   struct directory_entry *toc_entry = &pack_file->table_of_content[file_index];
-  FileSeek(&pack_file->opened_file,toc_entry->offset,0);
-  FileRead(&pack_file->opened_file,output_buffer,toc_entry->length);
-  DataTransferStop();
+  FileRom_HandleSeek(&pack_file->opened_file,toc_entry->offset,0);
+  FileRom_HandleRead(&pack_file->opened_file,output_buffer,toc_entry->length);
+  FileRom_StopDataTransfer();
   return toc_entry->length;
 }