If you want to do that and just play your games by hooking them up on your computer, you will need some hardware, a Flash Advance Linker Xtreme is the only one i seen that really does something special. You can order it, i am not sure if you can buy it at a store, but i am pretty sure you can. Just put the gameboy advance cartridge in the Flash Advance Linker, then put this baby into one of your USB Ports, and voila...
http://www.gamegizmo.com/products.ph...atID=13&pID=27
Heres a little more professional guide/information to add to what i just said, this is taken from GBXemu.com
Manufacturers hype:
The Flash Advance USB Linker is a next generation device to use with the Flash Advance Cards which adds a high performance USB port and other additional features to Visoly's Flash Advance family of products. Just like it's "printer port only" version, the Flash Advance USB Linker utilizes reliable and proven technology to deliver smooth working and a high-quality gaming experience without having to worry about compatibility issues.
Sending ROM files to your empty cartridge (Flash Advance Card): Simply use the provided software to open the ROM file from your PC, it will then send the data through the USB or printer port to the Flash Advance USB Linker, which will store the data in the Cartridge - just as when you connect your MP3 Player to your PC to 'fill' it with songs. Totally easy!
Hopefully this helps...
--LeGenD--