Womble also has a demux utility built into the tools section. I personally use the DVD-Lab Pro tool as it's much easier to drag the first VOB in the sequence and have everything split into its respective streams. Though I would recommend stripping the decoded disc to a movie only file first using something like DVD-Fab. It's an extra step, but I think it gets all of the menus, extra language tracks (if you don't plan to use them for anything) and junk out of your way.