i know you already bought Nero8 but alot of people seem to use the anydvd/clonedvd combo for backing up movie dvd’s.
Nero (in my opinion) aint that good of a application… and im my opinion Nero got crappy after version 6. (i switched to ImgBurn + Burrrn combo for my general data/audio burning needs myself)
but even if you get ANYDVD (DVDFAB Platinum is another good one) … you might even be able to use a free app like dvdshrink etc if your trying to save some cash.
just some thoughts