I'd say, rip the subs from the official DVD, and modify them. That way the timecodes are almost right, synching them up at about 10 spots will do the trick. On doom9.net there's a guide for SubRip, in URUSoft Subtitle Workshop you can edit them and synch them up to the movie, which you can rip with this program. And finally I'd use Adobe Encore for the mastering.