If the volume of the disc is simply too large, DVD Shrink will not be able to compress it enough so it'll fit on one disc. I've had this problem in the past myself. I suggest you try using programs like DVDFab Platinum, DVDXCopy Express or 1Click DVD Copy. These programs will automatically compress & copy the entire disc if you wish, or copy the "movie only" with little or no compression. I suggest "movie only" for the least amount of time it takes to copy & burn, & for best quality.