diff --git a/src/headers/common.h b/src/headers/common.h
index 9b35fb8..9bfa0fa 100644
--- a/src/headers/common.h
+++ b/src/headers/common.h
@@ -406,7 +406,7 @@ struct SongEntry
 	char maniaxDouble;
 	char version;     // for sorting
 	int numPlays;     // the only non-static data in this structure
-	char unlockFlag;
+	char specialFlag; // 
 	bool isNew;
 
 	SongEntry::SongEntry()
@@ -428,7 +428,7 @@ struct SongEntry
 		maniaxDouble = xd;
 		version = v;
 		numPlays = 0;
-		unlockFlag = 0;
+		specialFlag = 0;
 	}
 };
 
@@ -439,11 +439,11 @@ struct SongEntry
 #define DOUBLE_WILD 11
 #define DOUBLE_ANOTHER 12 
 
-#define UNLOCK_METHOD_NONE 0
-#define UNLOCK_METHOD_EXTRA_STAGE 1
-#define UNLOCK_METHOD_CLEAR 2
-#define UNLOCK_METHOD_SPECIAL 3
-#define UNLOCK_METHOD_ROULETTE 4
+#define SPECIAL_FLAG_NONE 0
+#define SPECIAL_FLAG_UNLOCK_METHOD_EXTRA_STAGE 1
+#define SPECIAL_FLAG_HAS_ALTERNATE_MUSIC 2
+#define SPECIAL_FLAG_UNUSED_DELTA 4
+#define SPECIAL_FLAG_UNUSED_EPSILON 8
 
 int songID_to_listID(int songID);
 int listID_to_songID(int index);
diff --git a/src/headers/gameStateManager.h b/src/headers/gameStateManager.h
index 700e489..31b22e6 100644
--- a/src/headers/gameStateManager.h
+++ b/src/headers/gameStateManager.h
@@ -291,38 +291,40 @@ public:
 		isFreestyleMode = false;
 	}
 
-	void loadSong(int songID, bool preview = false)
+	void loadSong(int songID, bool preview = false, bool useAlternateMusic = false)
 	{
 		char filename[64] = "DATA/audio/112.mp3";
-		filename[11] = (songID/100 % 10) + '0';
-		filename[12] = (songID/10 % 10) + '0';
-		filename[13] = (songID % 10) + '0';
+		int digitsOffset = 11;
+		int fileextOffset = 15;
+
 		if ( preview )
 		{
 			strcpy_s(filename, 64, "DATA/audio/pre_112.mp3");
-			filename[15] = (songID/100 % 10) + '0';
-			filename[16] = (songID/10 % 10) + '0';
-			filename[17] = (songID % 10) + '0';
+			digitsOffset = 15;
+			fileextOffset = 19;
 		}
+		if ( useAlternateMusic )
+		{
+			strcpy_s(filename, 64, "DATA/audio/112b.mp3");
+			digitsOffset = 11;
+			fileextOffset = 16;
+		}
+
+		// str replace the song id
+		filename[digitsOffset] = (songID/100 % 10) + '0';
+		filename[digitsOffset+1] = (songID/10 % 10) + '0';
+		filename[digitsOffset+2] = (songID % 10) + '0';
 
 		currentSongIsPreview = preview;
 		killSong();
 		currentSongSample = FSOUND_Sample_Load(FSOUND_UNMANAGED, filename, FSOUND_NORMAL | FSOUND_MPEGACCURATE, 0, 0);
 		if ( currentSongSample == NULL )
 		{
-			// try again as an ogg
-			if ( preview )
-			{
-				filename[19] = 'o';
-				filename[20] = 'g';
-				filename[21] = 'g';
-			}
-			else
-			{
-				filename[15] = 'o';
-				filename[16] = 'g';
-				filename[17] = 'g';
-			}
+			// str replace the file extension
+			filename[fileextOffset] = 'o';
+			filename[fileextOffset+1] = 'g';
+			filename[fileextOffset+2] = 'g';
+
 			currentSongSample = FSOUND_Sample_Load(FSOUND_UNMANAGED, filename, FSOUND_NORMAL, 0, 0);
 
 			if ( currentSongSample == NULL )
diff --git a/src/source/gameplayMode.cpp b/src/source/gameplayMode.cpp
index 2ef1743..036f044 100644
--- a/src/source/gameplayMode.cpp
+++ b/src/source/gameplayMode.cpp
@@ -1144,8 +1144,18 @@ void loadNextSong()
 			arrangeChart(&gs.player[p].currentChart, &gs.player[p].freezeArrows, gs.player[p].arrangeModifier, gs.isDoubles);
 		}
 	}
+	
+	// check for alternate versions of songs? (used for maniax charts)
+	bool useAlternateMusic = false;
+	if ( (songs[songID_to_listID(gs.player[0].stagesPlayed[gs.currentStage])].specialFlag & SPECIAL_FLAG_HAS_ALTERNATE_MUSIC) != 0 )
+	{
+		if ( gs.player[0].stagesLevels[gs.currentStage] == SINGLE_ANOTHER || gs.player[0].stagesLevels[gs.currentStage] == DOUBLE_ANOTHER || (gs.isVersus && gs.player[1].stagesLevels[gs.currentStage] == SINGLE_ANOTHER) )
+		{
+			useAlternateMusic = true;
+		}
+	}
 
-	gs.loadSong(gs.player[0].stagesPlayed[gs.currentStage]);
+	gs.loadSong(gs.player[0].stagesPlayed[gs.currentStage], false, useAlternateMusic);
 	vm.loadScript(movieScripts[songID_to_listID(gs.player[0].stagesPlayed[gs.currentStage])].c_str()); // I love the "])]" on this line!!!
 	gs.playSong();
 	vm.play();
@@ -1372,7 +1382,7 @@ int checkForExtraStages()
 		{
 			songIndexError(gs.player[0].stagesPlayed[gs.numSongsPerSet]);
 		}
-		if ( awardedExtra && songs[songIndex].unlockFlag == UNLOCK_METHOD_EXTRA_STAGE )
+		if ( awardedExtra && songs[songIndex].specialFlag & SPECIAL_FLAG_UNLOCK_METHOD_EXTRA_STAGE )
 		{
 			if ( sm.player[0].currentSet[gs.numSongsPerSet].getScore() >= 900000 )
 			{
diff --git a/src/source/main.cpp b/src/source/main.cpp
index 6b238fc..4a8ca09 100644
--- a/src/source/main.cpp
+++ b/src/source/main.cpp
@@ -1582,7 +1582,7 @@ int loadSongDB()
 		songArtists[i].assign(artist, strlen(artist));
 		movieScripts[i].assign(movie, strlen(movie));
 		songs[i].initialize(id, minbpm, maxbpm, sm, sw, sx, dm, dw, dx, version); // BROKEN MY HEART
-		songs[i].unlockFlag = flag;
+		songs[i].specialFlag = flag;
 		songs[i].isNew = isNew == 1;
 
 		if ( version == 101 )
diff --git a/src/source/nonstopMode.cpp b/src/source/nonstopMode.cpp
index 1b43e2e..cd599fa 100644
--- a/src/source/nonstopMode.cpp
+++ b/src/source/nonstopMode.cpp
@@ -146,7 +146,7 @@ void firstNonstopLoop()
 	{
 		if ( songs[i].version == 101 )
 		{
-			if ( songs[i].unlockFlag != UNLOCK_METHOD_NONE )
+			if ( songs[i].specialFlag != SPECIAL_FLAG_NONE )
 			{
 				continue; // course is locked
 			}
diff --git a/src/source/songwheelMode.cpp b/src/source/songwheelMode.cpp
index a80ccdb..19f608c 100644
--- a/src/source/songwheelMode.cpp
+++ b/src/source/songwheelMode.cpp
@@ -189,7 +189,7 @@ bool isSongAvailable(int index)
 {
 	bool earnedIt = true;
 
-	if ( songs[index].unlockFlag != UNLOCK_METHOD_NONE )
+	if ( (songs[index].specialFlag & SPECIAL_FLAG_UNLOCK_METHOD_EXTRA_STAGE) != 0 )
 	{
 		earnedIt = false;
 
@@ -295,24 +295,27 @@ void firstSongwheelLoop()
 			songlist[nextIndex] = songs[i];
 
 			// certain charts may be locked
-			if ( songs[i].unlockFlag != UNLOCK_METHOD_NONE && !allsongsDebug )
+			if ( ((songs[i].specialFlag & SPECIAL_FLAG_UNLOCK_METHOD_EXTRA_STAGE) != 0) && !allsongsDebug )
 			{
-				if ( sm.player[0].allTime[i][3].unlockStatus == 0 )
+				bool hasWildChart = true; // if they have the wild chart, they get mild for free
+				if ( sm.player[0].allTime[i][SINGLE_WILD].unlockStatus == 0 && sm.player[1].allTime[i][SINGLE_WILD].unlockStatus == 0 )
 				{
-					songlist[nextIndex].mildDouble = 0;
+					songlist[nextIndex].wildSingle = 0;
+					hasWildChart = false;
 				}
 				if ( sm.player[0].allTime[i][4].unlockStatus == 0 )
 				{
 					songlist[nextIndex].wildDouble = 0;
+					hasWildChart = false;
 				}
-				if ( sm.player[0].allTime[i][SINGLE_MILD].unlockStatus == 0 && sm.player[1].allTime[i][SINGLE_MILD].unlockStatus == 0 )
+				if ( sm.player[0].allTime[i][3].unlockStatus == 0 && !hasWildChart )
+				{
+					songlist[nextIndex].mildDouble = 0;
+				}
+				if ( sm.player[0].allTime[i][SINGLE_MILD].unlockStatus == 0 && sm.player[1].allTime[i][SINGLE_MILD].unlockStatus == 0 && !hasWildChart )
 				{
 					songlist[nextIndex].mildSingle = 0;
 				}
-				if ( sm.player[0].allTime[i][SINGLE_WILD].unlockStatus == 0 && sm.player[1].allTime[i][SINGLE_WILD].unlockStatus == 0 )
-				{
-					songlist[nextIndex].wildSingle = 0;
-				}
 			}
 
 			if ( songlist[nextIndex].version == 5 && futureStartIndex == maxSongwheelIndex )