So I just downloaded an iso of super mario sunshine, and I've got a DVD-R here ready to burn, but the extracted iso was in file format ".gcm". I've gotten mixed answers across the net as to what you are supposed to do. Some say just burn it, others say rename is to .iso. I'm on wii 3.3U using *I THINK* Gamecube backup loader .2 or .3. Not sure.