Found an awesome website that lets you download TONS of free games to your PC: Sega Genesis, NES, Nintendo 64 etc. I've been having a blast with the N64 Super Mario world. Just download the system emulator, unzip it and download the games. It's a lot more fun if you buy a cheap USB controller though-otherwise you have to use the keyboard.
www.freeroms.com

thanks!

Through middle school me and a friend would always hunt down Nintendo and Super Nintendo roms. I love those classic games. I had a Nintendo when I was real young. Recently I bought a clone system and my favorite NES games plus an original controller and the "zapper" gun.

A good site I used to use was romhustler.net

They seemed to have most every game I could ever think of.