they also have ds games and even ps2 games but unfortunately you need one POWERFUL computer to operate the emulator the game system and a bit of hard drive space for the games for the most part esp. the GBA games they are simple to set up and use my little brother can operate it (chris).
they've also got a tutorial to save time and to relieve stress here's the link
here's a little something from their web site
What is emulation?
is the process of simulating the hardware of one machine on another machine so that the second machine is able to run for the first machine. The most popular type of emulation is video game emulation. This is when someone plays games from NES, SNES, Genesis, etc. on their PC.
What is an emulator?
An is the software that simulates the machine you wish to . This program allows you to run games that is designed for another system, such as NES, SNES, Genesis, etc.
What is a ROM file?
ROM stands for Read Only Memory. They are the games you run using an emulator.
Why doesn't this ROM work with this emulator?
Certain emulators run certain ROMs better, depending on its compatibility issue with it. Try running the ROM with different emulators. If the ROM still doesn't work, it's most likely that it's corrupt (not playable).
Why don't you have Mario ROMs?
Games, such as Mario and are protected by the ESA, and are illegal to distribute. We fully support the gaming industry, so if you really like those games, buy them!