How do I make a maxi-image of a DVD-ROM?



I’ve been using a full image of Madden 07 (DVD version) on my computer, and as I’m starting to run low on hard disk space, I’d like to use a maxi-image in order to save disc space. I tried using DKTigra’s Maxi-Image creator, and the image was created, but my computer doesn’t recognize it as a disc. I was wondering what settings I should put for the “Real Data from Start” and “Real Data from End” sections?