i have a android gs2 and ive downloaded a couple emulators . like cps2 , it wont work for some reason. i downloaded xmen vs. marvel and i load cache then i play , but all it shows is a white screen. i can here the game playing but its just a white screen. and also mama4droid why is it all the roms i download for it(mame) say missing images or something. what do i need to do to get this fixed?.