Can any1 help me? Diskjuggler and copying backups

Hi ppl, I'm trying to copy a self booting backup of a DC game using diskjuggler. I folowed the instructions someone listed in a previous topic i posted and everything worked fine except for this. After i take the image of the DC game it say the file is 707mb and just under 73mins. So the problem is is that is wont let me burn it onto a 700mb cd coz it's says the file wont fit. What do i do?