OK, so I am fairly new to mame but so far I've had no problem getting most of the games that interest me to run on various emulators on the ol PSP but two games are giving me a hard time.

Ninja Baseball Bat Man and Gunforce 2 no matter what I try just will not run. Can anyone here help a brother out? I'm running a PSP-Go with CFW-6.60 PRO-C

Thank you in advance!