Oh dear. I should have tried exporting a project before I went and bought V4. I got so carried away with Vegas' speed and realtime preview that I forgot to check the maximum output resolution. I was importing hi-res files no problem and I assumed output would be the same. Most of my work is hi-res CG. Now I have to go and find some other software to do exactly the same job as Vegas, but give me higher resolution output. Pity. Great software except for the limit.
I can't even brute-force script it?
Mark