[mwalt2]

It's not a registry edit. You replace StartMenu_Global_480x800.cpr, StartMenu_Global_800x_480.cpr, StartMenu_GridScene_480x800.cpr, and StartMenu_GridScene_800x480.cpr with blank text files of the same name (no .txt extension). Alternatively, you could just edit the .cpr with a text editor and delete everything. Replace with original or restore ROM ones (if originals cooked in) to get the start menu back.