I also took steps to mend fences by pointing out where you could go to find a lot more info on all this digital video stuff. People here are helpful and somewhat knowledgable, but they're also here for a highly-specific reason (Star Wars OT Preservation), and thus you're far less likely to get the depth of expertise with the questions you're asking here as opposed to someplace where the focus is solely digital video issues, without any specific content in mind.
You'll also probably find that members here are predominantly interested in content in the DVD format, so that it can be easily played on standalone units, rather than MPEG4, which for the most part is still tied to computer-based players, etc.
If you spend just a little time getting to know how DVDs are structured and burned, you're going to get a lot more out of this forum -- even if DVD is, for you, just a necessary evil on the road to making MPEG4 stuff for yourself. All you need to know about DVD structure is probably found in this document: http://www.doom9.org/dvd_basics.htm. After that, then I'd recommend http://www.doom9.org/guides.htm. And after that, there's always Doom9's forums...