First, i'm super jealous...
As for the regular system, I would copy something similar to what I use for shirts, just larger. It's the same basic idea as Alan's inverted triloc. It will make for easy pixel perfect registration of film on screen. For the press itself I would have to see it, but there are a few ways you could make a triloc style system for that as well.
When we move that press this weekend we can look at it and talk about how to upsize it for your frames.