@[member='Luigi2011SM64'],
I realize it's tough to not answer questions when you know the answer. Even I had to force myself to be vague in my initial response... but I'd appreciate it you didn't help people pirate... especially recommending they use my program to help them do so. Don't get me wrong, I'm sure there are pirates that use ModMii (same as there are pirates who use the HBC or usbloaders), but I'd prefer to avoid helping them pirate... I'd rather let them brick their Wii's trying to figure out how to pirate rather than help them use my program.
Since you already answered the OPs question, this is more of a "for future reference" request, and if you don't want to heed my suggestion, well... there's nothing I can do about it, lol. But yea, since the answer is already posted, I may as well clarify that you don't necessarily need a d2x cIOS, any patched IOS should do.