Use of DVD>DVD4 How to combine VOB

[harleycrobertson]

major,
Trying to use DVD>DVD4 in tools on a movie DVD (mine, decoded, not restricted) which has multiple VOB files. Docs say to "extract" VOB file.
DVD>DVD4 appears to only work on one VOB file and "join" does'nt seem to work on VOB files.
How do I conbine multiple 1GB VOB files into one to process in DVD>DVD4 ?
Or am I on the wrong track??
Any help from anyone is appreciated.

[major]

Use MTR to extract into one VOB file (by using 'Title/Chapter' mode).