thanks, I've managed to get kof2k2 working(oh the M rom doesnt conrespond to the CRC, I take it theres another version of M rom flying about). As for Matrimelee, I've got both pim and 266 copies. Somehow, Nebula doesnt seem to like Matrimelee at all, program shuts down when I got to scan for new roms with Matr in the neogeo.dat any suggestions?