Mac the Ripper will do fine for the entire disc, if you just want the movie, the process is called "ripping" and you can use Handbrake. The difference is Mac the Ripper will take the entire contents of the video and you can watch it in DVD player from your hard drive without the DVD in your computer, and Handbrake makes just the feature film a quicktime movie for you to watch through quicktime or iTunes.
Also always remember: The search forums feature is your friend!