Emulator Problem: Having some trouble playing MVC2.

I wanted to play MvC2 on my Mac, so I downloaded some emu's (Kega Genesis, Generator, and Genesis Plus) and tried to play it, but they don't work. On CoolRom, it said I need to unarchive the ROM. I did that and it just splits it into more files. Whenever I find a compatible file, it just shows a black screen. Can I get some help?

Guess I'll just figure it myself then.