ok hi, u no me kthx. ok. Well, first off the compiling mame yourself is in fact more versitile. u can add dats to play games that aren't listed among other things. as for yew, since i no u ;-) , and knowing that u play online occasionally with friends like meh :-P , that i could provide u with some steps to re-assure that u're doing things right. first off, when we played online the other day, we didnt involve ourselves with neo-geo games, hence i suggest u download the latest neogeo bios rom "neogeo.zip" Perhaps u dont have the newest version of the bios that mame recognizes. Second, u have left us with little information to work with. What exactly did mame do?? did it give u any messeges, perhaps missing a rom in the set?? If u d/l the rom from here, it should work. If not then the only conclusion is that u are missing or maybe have an out-dated version of the neo-geo bios rom. It works just like a game, u place it in your roms directory, in zip format. If that doesnt work than u down right have the wrong romset, are missing the parent romset, or are using a version of mame that does not support the set u have obtained. Try that and then hit me up on instant msger. Kthx. c-ya joe k?