It worked when I tried the sfiii3, turns out that I was using sfiii instead. Forgot about the 3. When I launched the game the first time, it had an over 20 minute wait time about something rewriting to CDrom, do you know what that is about? Also, for games like samurai showdownV, there were also some CRC errors, but the game runs fine and I can't detect any errors. So does that mean that those two files that the CRC didn't match doesn't really matter? Your going to have to rebuild your romset. My recommendation is to use clrmamepro. It might seem confusing at first but its good to keep your romset current. @Hera probably missing some files.