i thinkit is possible to add drivers from a different core as progear wasnt emulated till mame0.90. bendermike added drivers to play hyper streetfighter2 on bendermameox.so it might be possible.
if your stuck for playing gaurdian heroes,then try advance gaurdian heroes on the gba,its a pretty good game. visual boyadvance plays it really well or xboyadvancev2.0 on the xbox.
sounds good to me it can be a pain when any of the punch buttons or kick buttons are used in the back triggers. that gets my vote. geussing this will be the general layout for all mk games bs?
and what about games like Styder 2 and all the other games of that type? games like strider2 wont play on an xbox arcade emu as it dosent have the power under the hood to emulate that game if you want to play that game play it on pcsxbox.