complex dvd architect render

[movieman1005]

I know that for best quality you should render in mpeg 2 format in sony vegas with your template as ntsc dvd arch (widescreen if need be) and you render audio seperate (ac3) and they can match on timeline in dvd architect, but is that still possible if you're making a dvd with more than one video on it or multiple dvd menus? Or do you render a/v together in another format? Thanks for the help!

ps. The template is always ntsc or ntsc widescreen even if its hd video, right?