First is it possible to backup divx and mpeg 1 files to DVDr. I have tried to back up these files with the Nero, Prassi, and Vob instant CD+DVD. Most of the time the burn attempts just fail before they reach one percent: the only program that doesn't fail is Vob CD + DVD but the operating system fails to recognize the newly burned disc. I must mention that dvd movies made with nero and prassi work fine in my dvd player and on my computer.