I went through my entire collection over the last couple months and thought of this text when I read the interview post. I did show the Maze Demo at JagFest 2004 along with a parallax scrolling background(s) demo. So, I do have the Maze Demo wich generally looks and moves similar to DOOM and Wolfenstein. It is part of the Thea Realm Fighers (VRF/TRF) Milestones. Most of the other text files are about which moves/backgrounds/openings/.anim/variations/renaming of characters were completed or submitted. I have not seen the HVS tool mentioned.
You probably would not be able to recognize the tool if you seen it. It's a one of a kind. It may not be a Jaguar executable. It may be a pc executable that modifies the source files. But its probably like Wille said, a Jaguar runtime file that manages that. But it says something about post processing on there.
I doubt the tool is absolutely necessary to use the compiler. I think its just something they used to make easier something they otherwise would have to do manually. Sorta like the macros SubQmod put in smac to automate working around the main ram bug.
Whatever you are willing to share out of that stuff from texts or files would be very interesting. Can you share the maze demo with us? Or how about a youtube video of it?
This is all way interesting.