Total Commander file manager. Go to VTS_??_
2.VOB, copy it, enter VTS_??_
1.VOB as destination. You will be presented with a dialog box: Overwrite, Append, Skip, Cancel. Choose
Append. Repeat it with VTS_??_
3.VOB, etc.
Replace "??" with the program number you work with.
This can also be acomplished with DOS copy command. The point is, you work at the file level, disregarding the VOB contents. If possible make sure you copy between 2 different physical harddisks to increase the speed.
Note: You will not be able to properly play back the so called multi-angle DVDs with Elecard fillters.