DVDXCopy/DVDXGold et. al are nothing more than a collection of freeware apps that they wrote a step by step tutorial on how to use them, and possibly made some simple "wrapper" application that automatically executes the underlying freeware programs as needed.
You might as well toss the money you'd spend on those programs into the fireplace.
contains plenty of step by step tutorials on how to use all the applications listed.
DVD Decrypter + AutoGK or Gordian Knot = Rip DVD, encode to xvid (1 movie will fit on 1 CD, still very watchable)
DVD Shrink = Re-compress DVD to fit on 4.5GB media (ie: most readily available recordable DVD media)
DVD43 (aka DVD4free) or AnyDVD (not freeware) + DVD Decrypter = Full quality backups, but will require double layer/9GB media for most movies (more expensive and not as readily available)
It's a good idea to have DVD43 or AnyDVD running in the background regardless. DVD Decrypter is no longer being developed, and so far I haven't seen any suitable replacement. DVD Shrink I think was bought by Nero, and is now called Recode. So these apps will eventually fail on newer DVD's, as newer encryption's come out that they can't handle. Enter DVD43/AnyDVD to take care of any new encryptions on the fly. DVD43 is freeware, but not as actively updated as AnyDVD, which isn't freeware but one $30 purchase entitles you to lifetime updates.