On several games, this emulator is having problems keeping stable framerates. sometimes dipping into the low 20's while others having a good 60fps. any tips on how to run it so it speeds up, or does it just take too much processing power to emulate a wii/gamecube? Games like smash bros work fine, but even the new mario wii (not galaxy 2) is horrible. any ideas or is this common? thx!