Waninkoko has released cMIOS v5.
cMIOS is what lets you play gamecube backups on a wii.
I's been so long since he released the last update, that he can't remember what's been changed since that one.
FileTrip - cMIOS 5
I have it installed, but haven't gotten around to burning any of the gc iso's yet.
Someone please test it and report back to the forum:)