yeh, i can't get MK DD to work, when i open it, it says booting.... then at the bottom it says Mario Kart Double Dash, but it's a black screen and it doesn't come up with anything. It's a GCM file if that means anything.....
Well, it would help if you posted your computer specs. But, keep in mind, Dolphin is a wip emulator, and you can't assume that every rom will boot flawlessly. Patience...