Personally I gave up on WMP several years ago. VLC Media Player with the ffdshow codec package will play almost anything (and will play even slightly corrupted files that WMP won't touch). For DVDs where player-like controls and functions are useful, WinDVD or PowerDVD are hard to beat.
/EDIT/ See my post in your other thread. If you use Merge mode, you can de-select all but one audio, then make the VOB passthroughs using the Merge temp files.