Alright, I'll humor you. I will tell you that at this time it is impossible to play gamecube games off of a USB drive because when you play a gamecube game on the wii it runs in gamecube mode which basically means it only uses from the wii what would've been available on the original console and since USB ports were not on the original gamecube the gamecube doesn't know how handle or read USB ports.
If that wasn't clear or you need more info I or someone else on here can help you. :-)