In reply to TMM:
I used to decrypt and rip DVDs back in the day.
But now it's just not worth the time and effort. Ripping your DvDs is questionable in legality so you may as well be hung for a sheep as a lamb.
Just download a torrent. That way somebody else has done all the grafting of decrypting, ripping and then rendering into something such as mp4, xvid, divx, h.264 or what ever.