Guitar Hero 3 Speed Booster
replaces the in-game backgrounds (the stage) with blackness. This increases FPS and is completely reversible as a backup is made the first time you launch the app.
Version 1.3: Added different replacement options to use boost with, allowing a wider range of graphics cards to work with this program. If it didn't work before, it should now.
Guitar Hero 3 Installed (In English)
GH3 Patched to 1.3