I'm glad you're going to be able to add the documentary and intros/outros.
However, can I make two suggestions before you get round to doing the final DVD? Please don't use DVDShrink after authoring the disc (in DVD-Lab or the like). When you're putting the disc together jsut make sure that it'll all fit on one DVD - that way there's no degrade in quality. The other suggestion is; why not use Dolby Digital instead of MPEG Audio? If you don't have an encoder you should talk to some people around here who might be able to encode the audio files for you. I might be mistaken but I think Dolby Digital would take up slightly less space than MPEG audio. Plus, MPEG audio isn't as widely compatible as Dolby (Dolby being the DVD spec standard after all).
And once again, I can't wait till this is finished and I can grab a hold of it.