I just emailed you back, but for everyone else who may be interested:

after installing the emulators, you need to google the ROMs. I googled NES games and was given several cites. Navigate the cites, look for their download section and start downloading the games. Once you have those games then you start up the emulator and select the games you want to play. I'm trying to figure out how to customize the controls for the games because on super mario brothers all i can do is jump.