I have an old, old project from Premiere Pro 2 (PC) and AspectHD 4.2 that I have to finish on my modern system - Mac with CS3.

I installed the NeoHD trial and it plays the AVI files fine, they also open correctly in ReMaster, with the thumbnail and metadata. However, when I try to re-wrap to MOV I get black quicktime files with no video track, just audio.

By the way, ReMaster with those files looks like it's missing half the app - the Source and Processing parameter tabs are all blank, and Output doesn't give too many options either.
The files are CFHD-422 at 1280x720p 23.976p.

Any ideas?

The blank tabs for source and processing are correct in ReMaster. When you have AVI files as a source, there are no options available other than a re-wrap.

Re-wrap is simple, so the lack of video on the output is a puzzle. I suggest you contact support.