I use RecordNowDX which came with my Sony burner to actually copy the files from the harddrive to the blank DVD-R. First though, you have to Copy the movie to your harddrive using DVD DeCryptor or DVDFab, or Shrink. This removes the copy protection, and then gives you options to copy the movie only, copy the whold DVD with compression to one DVD, or re-author it to remove certain special features.
I downloaded DVDFAb last night and gave it a try, It also failed about half way through the process. Who nows, I know the disc is not bad as this has happened to me on other DVD's before, and the movie plays fine, the DVD is new and has no scratches. I don't know..