how to backup your dvd movie to another dvd on mac os x

1. mactheripper 2.6.6 works for me - makes a video_ts and audio_ts in a folder

option 1:
2. ffmpegx 0.0.9y > tools > img - will make a dvd image from the folder above
3. disk utility to burn img

option 2:
2. burn 2.4.1u - will make and burn a dvd image from the folder above in one step