What you do, is edit msdos.c of the mame source.at about line 200 you will find a line about playback, before that line you need to add override_path=0; That variable was added in Mame 0.37 beta 6, and needed to be initialized, the playback routine lackes that, thus causing mame not to find the roms. Hope this helps.(posted 9240 days ago)Stig