Excellent advices in this series! However (and forgive my being naive), once you have the MPEG2 ready for import into DVD Architect 5.0, how do you add the audio track of the original Vegas Pro project?
You render your project out to AC-3 in Vegas with the same project name. Architect will see the .ac3 under the same name when you drop the .mpg in, and will automatically connect them.