As you know the DVD R blank disks only allow 4.5Gb for present DVD recorders, with this software you can make a backup of your DVD (which can be upto 19Gb) fit on one DVD R
DVD Shrink
DVD Shrink is software to backup DVD disks. You can use this software in conjunction with DVD burning software of your choice, to make a backup copy of any DVD video disk.
DVD Shrink does not burn DVDs! The output from DVD Shrink is saved as files on your hard drive, which you can then burn to a DVD-R using separate burning software, such as the software provided with your DVD-R drive.
http://www.dvdr-digest.com/software/software.php?file=dvdshrink
Brian