use dvd decrypter to decrypt the movie 1st (do the whole movie even if you dont want the whole disc)
i tried fooling about (im new too had a dvd writer for 7 days)
found dvd2one was really pretty good & quick. & VERY easy to use. its about Â£33 but for newbies like us its very good & you can get a trial version that does 30 mins to see if it seems to work on your set up (similar to mine except i got old windows 98SE)
you can either rip just the movie. if its a dual layer disc,
or you can use it to compress the WHOLE of the dual layer disc (DVD9) to your writable dvd , the quality is pretty damn good (i done goldmember & scooby doo & compared them to the original & picure quality was v similar if you consider its usually doubled the compression of the main movie. most layman would have to look hard to notice the difference)
burn the new files to a dvd-rw (that was if u messed up you go again) try it on a few dvd players, also try different media, some are better to write to than others.
i use the latest version of nero, but use something your comfortable with, but use the latest version.
thats what ive learned in 10 days.