I have always made a back-up copy of all programs and important files to be on the safe side(and keep the orginal CD locked away). Well today the softbound case with my copies got sat on(by a very large friend)...so now I have to make several new back-ups. When I went to CompUSA to pick up a case of CD's,they were telling me that for programs,I should copy as an iso. What is that??...I've heard of it being a "mirror image",but what does that do for my copy? Thanks,SWAMP