[Michael O'Connor] "From sony vegas 7 going to dvd-a4 do I need to render my veg file to avi and then render again when I build a dvd?"
No, you can, and should, render your video to MPEG2 using one of the "DVD Architect" templates and then render your audio as Dolby Digital AC-3 using the same filename as the video. DVD Architect will see that the .mpg and .ac3 files have the same name and treat them as one.
~jr
http://www.johnrofrano.com
http://www.vasst.com