You get the custom firmware on the wii. Then you download the ISO from some illegal place. Once downloaded, you just compile it and use DVDs or WFSB manager to place it on a USB stick or external harddrive.
Alright. Thanks for the info. I don't know how he'll feel about having to download things because he's pretty protective of his stuff and I'd imagine he'd be worried about viruses and such. But if you guys have done it and haven't had any problems, I guess it's ok, and if need be, you could inform me on safe sources for games?