My DVD Arch project freezes when rendering
Well, this may be part of the problem. You do not want DVDA to re-encode your video - any re-encode compromises video quality. You encode the video in Vegas using the appropriate DVD Architect template and bitrate settings. All DVDA should do is prepare the vob file structure (for DVD) or the iso file for Blu-Ray.
Steve Mann
MannMade Digital Video
http://www.mmdv.com