Just got my MAME system up and running. I'm having trouble playing METAL SLUG 3 for some reason. The game opens, sound works fine, but the graphics are really distorted and the game is unplayable. A friend said it may be that I don't have enough memory, but I added a stick of 256 and it still didn't work. METAL SLUG 1 and 2 work fine. Has anyone had any problems with #3? I have an AMD 1400/128MB pc running the games.