Create DVD on which videos are played sequentially

This is a followup to my previous post on DVD Authoring with tovid on Linux. One thing I really don't like is that after one video is played, it always jump back to the menu. My desired behavior is playing the next video instead unless it is the last one. (Here is one example: I create DVD for videos taken at classes. Each sub-menu on my DVD corresponds to a lesson and contains all videos from that lesson. )

To achieve the desired behavior, I have two choices:
1) group videos from a lesson together so that they will be played one after another but I lose the chapter markers.
2) edit the XML. Each of my video (the proper term is PGC) has a post-action, which is written as "call menu;" by tovid. I simply need to change them to "jump title X;" where X refers to the number of the next video.