THX guys, but i think i'm gonna do my rom life on a computer and little less on xbox. Faster loading, games work better, no crc error, no files missing, no memory problems, etc...(in a way it's normal) When i take a game like s1945p.zip, MAME v0.105.dat show it complete and the game works on a PC, but MAMEoX128_Plus!_ver20060412(RomCenter).dat show it complete too but the game don't work on xbox because xbox show that some files are missing. Also when a game.zip seems incomplete, on a computer the game work, i don't know how, may be it take other roms in other games, but on xbox the game will not work until you repare it with rom center. To much difference between mame xbox and mame pc, but it's the fault of the xbox, i hope that 360 will be patched so i'll by it and i hope emulators will work as good on it as on PC.