A custom mIOS would have to be created.
The mIOS goes into a gamecube mode shuts out the Wii remotes, SD card, and USB ports. Along with that, it caps the memory to how much the gamecube uses. The extra memory would have to be modified and the USB support would have to be added in.
I'm not exactly sure if this would work since a lot of files won't work if they exceed a certain size limit for the file.
The mIOS goes into a gamecube mode shuts out the Wii remotes, SD card, and USB ports. Along with that, it caps the memory to how much the gamecube uses. The extra memory would have to be modified and the USB support would have to be added in.
I'm not exactly sure if this would work since a lot of files won't work if they exceed a certain size limit for the file.