I don't get what you guys mean... Sorry, I havent touched anything to with dreamcast for about 5 years.. I feel like a noob all over again, lol. EDIT: OK I looked up how to format the GDI but now I have another problem, NullDC crashes when I try to start up Sonic again. It's a PAL dump. I've tried the PAL and NTSC bioses also, it still crashes. What do I do? EDIT: Ooooh I did have to reformat, thanks so much!