Yeah, that's exactly the thing - the way I understand it, when they are authoring seamless branching professionally, they can determine where the data for each chapter will physically be on the disc and thus make sure the playback doesn't skip during the transitions. I am fascinated by BD features like maximum movie mode as seen for example on the last two Harry Potter films and Terminator Salvation. Basically it turns the film into a similar thing like Jambe Davdar's docs, only it does it in real time, using the actual HD footage of the main feature on the disc. This would be awesome if I could do something like this on the DeEd BD, because then it could pause on each despecialized shot and explain how it was done and show some before/after footage and stuff but it's just way out of the realm of possibility here.

EDIT: That sounds really interesting DJ. Which project are you doing this for?