diff --git a/README.md b/README.md
index 05f8233..3604373 100644
--- a/README.md
+++ b/README.md
@@ -34,8 +34,8 @@ The following games are supported with their corresponding hook-libraries.
     * BeatStream アニムトライヴ (`bst.zip`): bsthook
 * [Dance Dance Revolution](doc/ddrhook/README.md)
     * Dance Dance Revolution X (`ddr-11.zip`): [ddrhook1](doc/ddrhook/ddrhook1.md)
-    * Dance Dance Revolution X2 (`ddr-12.zip`): [ddrhook2](doc/ddrhook/ddrhook2.md)
-    * Dance Dance Revolution X3 vs. 2ndMIX (`ddr-13.zip`): [ddrhook2](doc/ddrhook/ddrhook2.md)
+    * Dance Dance Revolution X2 (US/EU regions) (`ddr-12-us.zip`): [ddrhook1](doc/ddrhook/ddrhook1.md)
+    * Dance Dance Revolution X2 (JP region) (`ddr-12.zip`): [ddrhook2](doc/ddrhook/ddrhook2.md)
     * Dance Dance Revolution 2013 (`ddr-14-to-16.zip`): [ddrhook2](doc/ddrhook/ddrhook2.md)
     * Dance Dance Revolution 2014 (`ddr-14-to-16.zip`): [ddrhook2](doc/ddrhook/ddrhook2.md)
     * Dance Dance Revolution A (`ddr-14-to-16.zip`): [ddrhook2](doc/ddrhook/ddrhook2.md)
diff --git a/doc/ddrhook/README.md b/doc/ddrhook/README.md
index 3bd6700..871c0b4 100644
--- a/doc/ddrhook/README.md
+++ b/doc/ddrhook/README.md
@@ -16,8 +16,8 @@ the years. Some game versions might require patches/parameters enabled which
 others don't need or have different AVS versions. Here is the list of supported 
 games:
 
-* [ddrhook1](ddrhook1.md): X
-* [ddrhook2](ddrhook2.md): X2, X3 vs. 2ndMIX, 2013, 2014, A
+* [ddrhook1](ddrhook1.md): X, X2 (US/EU regions)
+* [ddrhook2](ddrhook2.md): X2 (JP region), X3 vs. 2ndMIX, 2013, 2014, A
 
 When building bemanitools, independent packages are created for each set of games
 which are ready to be dropped on top of vanilla AC data dumps. We recommend
@@ -26,8 +26,8 @@ binary patches.
 
 ## How to run
 
-To run your game with iidxhook, you have to use the inject tool to inject the
-DLL to the game process. `dist/iidx` contains bat scripts with all the
+To run your game with ddrhook, you have to use the inject tool to inject the
+DLL to the game process. `dist/ddr` contains bat scripts with all the
 important parameters configured. Further parameters can be added but might not
 be required to run the game with default settings.
 Further information on how to setup the data for each specific version are
@@ -35,7 +35,7 @@ elaborated in their dedicated readme files.
 
 ## Command line options
 
-Add the argument *-h* when running inject with iidxhook to print help/usage
+Add the argument *-h* when running inject with ddrhook to print help/usage
 information with a list of parameters you can apply to tweak various things.
 
 ## ddrio API
diff --git a/doc/ddrhook/ddrhook1.md b/doc/ddrhook/ddrhook1.md
index 3df4cca..0da6e2d 100644
--- a/doc/ddrhook/ddrhook1.md
+++ b/doc/ddrhook/ddrhook1.md
@@ -5,6 +5,7 @@
 The following games are supported with this hook library:
 
 * Dance Dance Revolution X
+* Dance Dance Revolution X2 (US/EU regions)
 
 The games must be bootstrapped using [inject](../inject.md).
 
@@ -80,7 +81,7 @@ Set-up your folder mappings in the
 * Set P1 USB memory data path pointing to local folder `usbmem_p2` next to `DDR.EXE`:
   `ddrhook1.usbmem_path_p1=usbmem_p2`
 * Have/create a subfolder called `DDR_EDIT` on any location/USB drive you want to use
-* Name your edit data file either `DDR_EDIT_J.DAT` (for JP version) or `DDR_EDIT_US.DAT`
+* Name your edit data file either `DDR_EDIT_J.DAT` (for JP version) or `DDR_EDIT_U.DAT`
   (for US version) and place it in the `DDR_EDIT` directory.
 
 For the example setup above, the full relative path of the edit file should be
diff --git a/doc/ddrhook/ddrhook2.md b/doc/ddrhook/ddrhook2.md
index e94c409..8171615 100644
--- a/doc/ddrhook/ddrhook2.md
+++ b/doc/ddrhook/ddrhook2.md
@@ -4,7 +4,7 @@
 
 The following games are supported by this hook library:
 
-* Dance Dance Revolution X2
+* Dance Dance Revolution X2 (JP region)
 * Dance Dance Revolution X3 vs. 2ndMIX
 * Dance Dance Revolution 2013
 * Dance Dance Revolution 2014