MAJOR PROBLEM!!! NEED HELP!!!

Okay, I got my ISO, and I have my .cdi file ready for disk juggler. Problem is, it says that it's a disk juggler image, but it's a .cdj not .cdi, and randomly in disk juggler it says cdj or cdi and it's REALLY ####ting to piss me off. I was wondering if anyone could help, like specifically which disk juggler to get for the job and how to change my cdj file to cdi. Plus, when i do the open command in disk juggler it won't see the file even tho it's the same as it says to be! plz help...i did use a crack, but without it i can't burn!