I'm using NeroVideoExpress 3 (specifically 18.104.22.168) And for copying DVD's it works wonderfully.
Also you should get, as suggested, the latest DVD Decrypter and read each programs' help files or the guides in this forum and others.
In the most general way, DVD Decrypter rips DVD's to your hard drive and can burn unprocessed data back out to disk if there are no file size limitations. Otherwise you need to compress the video, for which Nero Recode works well (but it isn't free) or DVD Shrink will do for free. I haven't used Shrink but many here have and it is supposed to be quite similar to Recode and works pretty well, too, I believe. You need a DVD burner, blank DVD's, and at least 10 free gigs of hard drive space and I'd guess a computer no more than 4 or 5 years old to process the info fast enough you don't go insane waiting.