Can someone please tell met the difference between exporting a Cineform HDV Avi and Cineform HD export?

Don't use "Cineform HDV AVI" as the is the Premiere Pro 1.5.1 license component that is now very old and lower quality. Unfortunately we aren't allow to delete parts of your Adobe installation, otherwise we would :). Use "CineForm HD Export" as that contains the latest features and quality controls for Aspect HD and Prospect HD. Fortunately Premiere Pro 2.0 doesn't have the older exporter.

Thanks David, I am going to have to fix some things...