Sprin HTC EVO 4G Help!!!!?

[cody]

Ok so I have the EVO 4g and im trying to play games such as mario and pokemon and stuff like that on the NES Lite app that you get off the android market. Ok so the recommended site for the games or ROMS is Doperoms.com. Ok so I found them i got the app and now they get downloaded as a .zip file which I knew ok so i have the app to unzip those files...buutt when you download them where do they go? here not in downloads and they dont go straight to the SD card.???? any that has done this that cane till me there step by step way that they did it please?????thank syou I need help