Reading in another forum that Isobuster did good job of reading discs that otherwise were unplayable. I am not real familiar with this tool, but tried it on a DVD that 'Shrink could not decode. Isob. also could not read at least 2 files, thus I guess I cant make workable backup. I did use a scratch tool on the disc before attempt. Had hoped it was going to read all but what was impossible, then provide useable file that may skip just seconds here or there when burning. Just what is main use for ISObuster?