Add chapters to already authored DVD?
 

So my friend has a DVD of his parent's 50's wedding aniversary and the studio forgot to add any sort of chapter marks so they could skip forward through the boring stuff. Is it possible to reauthor the DVD and only add chapter points without having to recompress the video again?

Currently I know how to rip the dvd back to my HD and get the audio and video files from it so I could do a complete re-edit but at that point I lose the menus and I would rather not try to recreate them. I'm just looking for a simple way to add chapter breaks. I've searched through www.videohelp.com but not finding anything that's really helping.

There must be tools out there. I can do it with DVDAfterEdit ME on Mac so I'm sure there must be Win tools... PGCEdit maybe...

Jake