diff --git a/.gitignore b/.gitignore
index f7c4e9e2..c6f838da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,3 +66,4 @@ _Deparsed_XSubs.pm
 *.sna
 __pycache__
 .vscode/settings.json
+assets/
\ No newline at end of file
diff --git a/INSTALL.md b/INSTALL.md
index 42f27dd5..1c8a4fa3 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,18 +1,11 @@
 # Install
 First, you must put a The Legend of Zelda: The Minish Cap (U) ROM (with SHA1: `b4bd50e4131b027c334547b4524e2dbbd4227130`) in the root directory of the repository and name it `baserom.gba`. 
 
+## Extract assets
+Run `python tools/asset_extractor/asset_extractor.py usa`.
 
 ## Building other variants
-To build other variants, you currently need a combination of different baseroms, depending on the variant.
-| | USA | JP | EU | DEMO_USA | DEMO_JP |
-| - | :-: | :-: | :-: | :-: | :-: |
-| baserom.gba | X | X | X | X | X |
-| baserom_jp.gba | | X | X | | X |
-| baserom_eu.gba | | | X | | |
-| baserom_demo.gba | | | | X |  |
-| baserom_demo_jp.gba | | | | | X |
-
-
+To build other variants, you need to place the corresponding baserom and then extract the assets, e.g. for JP: `baserom_jp.gba` and run `python tools/asset_extractor/asset_extractor.py jp`.
 
 ## Prerequisites
 
diff --git a/Makefile b/Makefile
index 360a949d..b3f90c05 100644
--- a/Makefile
+++ b/Makefile
@@ -185,6 +185,7 @@ include songs.mk
 %.png: ;
 %.pal: ;
 %.aif: ;
+%.bin: ;
 
 %.1bpp: %.png  ; $(GFX) $< $@
 %.4bpp: %.png  ; $(GFX) $< $@
@@ -262,44 +263,38 @@ baserom_eu.gba:
 baserom_demo_jp.gba:
 endif
 ifeq ($(GAME_VERSION), DEMO_USA)
-baserom.gba:
-	$(error "You need to provide a USA ROM as baserom.gba")
 baserom_demo.gba:
 	$(error "You need to provide a DEMO ROM as baserom_demo.gba")
-.PHONY: baserom_jp.gba baserom_eu.gba baserom_demo_jp.gba
+.PHONY: baserom_jp.gba baserom_eu.gba baserom.gba baserom_demo_jp.gba
+baserom.gba:
 baserom_jp.gba:
 baserom_eu.gba:
 baserom_demo_jp.gba:
 endif
 ifeq ($(GAME_VERSION), JP)
-baserom.gba:
-	$(error "You need to provide a USA ROM as baserom.gba")
 baserom_jp.gba:
 	$(error "You need to provide a JP ROM as baserom_jp.gba")
-.PHONY: baserom_demo.gba baserom_eu.gba baserom_demo_jp.gba
+.PHONY: baserom_demo.gba baserom_eu.gba baserom.gba baserom_demo_jp.gba
+baserom.gba:
 baserom_demo.gba:
 baserom_eu.gba:
 baserom_demo_jp.gba:
 endif
 ifeq ($(GAME_VERSION), DEMO_JP)
-baserom.gba:
-	$(error "You need to provide a USA ROM as baserom.gba")
-baserom_jp.gba:
-	$(error "You need to provide a JP ROM as baserom_jp.gba")
 baserom_demo_jp.gba:
 	$(error "You need to provide a DEMO JP ROM as baserom_demo_jp.gba")
-.PHONY: baserom_demo.gba baserom_eu.gba
-baserom_demo.gba:
+.PHONY: baserom_jp.gba baserom_eu.gba baserom.gba baserom_demo.gba
+baserom.gba:
+baserom_jp.gba:
 baserom_eu.gba:
+baserom_demo.gba:
 endif
 ifeq ($(GAME_VERSION), EU)
-baserom.gba:
-	$(error "You need to provide a USA ROM as baserom.gba")
-baserom_jp.gba:
-	$(error "You need to provide a JP ROM as baserom_jp.gba")
 baserom_eu.gba:
 	$(error "You need to provide a EU ROM as baserom_eu.gba")
-.PHONY: baserom_demo.gba baserom_demo_jp.gba
+.PHONY: baserom_demo.gba baserom.gba baserom_jp.gba baserom_demo_jp.gba
+baserom.gba:
+baserom_jp.gba:
 baserom_demo.gba:
 baserom_demo_jp.gba:
 endif