I had the same problem a while back.

What i did was go to MegaMame CE, select the option for 'view all selected games' or something (I dont have it with me so i cant check). This then will populate the window with a list of 100's of games. I presume these are the games which will work with MegaMame. Then download these games and make sure theyre exactly 100% the title it says.

If you have any probs email me (psj3809@hotmail.com) and i'll send you some rom's so you can test it. I play Bombjack a ton as on the Asus it runs 100% with sound.