i think it's vgs that runs the games, and not the other way around.
but usually VGS has a very high rate of compatibility with RPGs. I know it runs (most) Final Fantasies, Suikodens, Breath of Fires, etc. etc. blah blah blah. try buying/borrowing games and see what works!
Some RPGs known to run reluctantly in VGS albeit going through a lot of hassle include Valkyrie Profile and FFIX.
or you could try going to this site:
http://come.to/cvgs
it's a VGS compatibility list. Try searching for your fave game there and see if it works or not.
