I was using ImgBurn in the build mode, backing up one of my dvd's. I chose the VIDEO & AUDIO TS folders that i wanted, chose a folder to save my iso file, clicked on the calculator icon on the right of the img window, and it came back at 89%. What does this mean? Why wasnt it at 100%? Does it mean that only 89% of the movie is gonna be burned to my DVD-R? The DVD that i was backing up was a dual layer disc. I removed a lot of the unescessary language menus to free up space in DVD Shrink, and thought I freed up enough to have it compressed to fit on a single layer DVD-R. Do I need a double layer? What can I do to make it work?

I would appreciate any help, Thanks.