Paul LS offers this excellent solution:
Go to Start>All Programs>Accessories>Command Prompt... the Command Prompt window will open.
Assuming C: is your hard drive and D: is your DVD drive type the following commands...
type: "d:" and press Enter, then type what is between the ".." below:
type: "cd video_ts" and Enter
type: "copy /b vts_01_0.vob + vts_01_1.vob + vts_01_2.vob c:\DVD.vob"
vts_01_0.vob + vts_01_1.vob... etc are the vob files in the VIDEO_TS folder on the DVD.
(Substitute the actual names of the vob files in your DVD's VIDEO_TS folder for "vts_01_0.vob", etc.)
You will find the joined vob file under your C: directory and named "DVD.vob".
This file is a single file with all the component vob files joined together.
Note it could take some time to combine the vob files. Once it is complete it will say "1file copied" in the Command Prompt window.
