DvdDecrypter allows you to rip the contents of an original dvd to your computers harddrive and to be able to use to burn to a blank dvd+/-r.
DvdShrink allows you to take out or keep original contents of a movie or just to do the movie only without the extras!
I use both and love them! Best freeware progs i have used! Since DvdDecrypter has now been stopped of updating, newer movies with protection may have troble being ripped to hd. In that case, use Fabdvd Decrypter. Do a search over on afterdawn.com for safe downloads. Hope this doesn't break any rules, if so let me know and i'll change.