Rafael,
Wow, what am I missing here. First-of-all, I tried exporting a 3-minute 720p project to Pro-Res, and it took about 30 minutes on my Mac Pro, so I don’t see the time savings here. Also, it produced a huge file. Why not just export the HD timeline directly to Compressor, or export a QT reference movie and drop that into Compressor? No need to ever go to DV, and I get excellent results this way? Why all the different steps?