Converting from DVD

Hi folks. I have a question about converting movies from DVD into a format
that is compatible with Movie Maker. I've read the instructions at
www.papajohn.org/import movie source/discs and related newsletter. Following
that advice, I have converted the .vob file to an M2v file using TMPGenc.
However, I cannot convert that file to an .AVI file. When I try to open the
M2v file in TMPGEnc, I get an error message that says the file is unsipported
or cannot be opened.

I am using TMPGEnc version 2.5 that I downloaded for free on the TMPGEnc
website. Do I need some sort of souped up version of TMPGEnc or something?
THanks.