there are many ways to do this, most of which i have recently tried,
and the simplest way to do it is to
>export to compressor
>chose dvd fastest encode (looks the same as best quality), all
>*important* double click your mpeg-2 entry under setting,
under the video format tab, set the field dominance to Bottom first.
>then if your taking it to dvd studio, change your preferences there also to bottom first.
another way is to export with quicktime to dvcprohd 720p, then to compressor normally. but the top way is faster.
-cade