Hi Kirk,
I think you misunderstood me in a good way! I did not ask for an actual exhibition tool. But a tool to prepare for the exhibition, or book/magazine.... but then your idea is worth thinking about too! Could be way cool!
My idea was just to have an easy layout testing tool in PM. To be able to place images on a "wall" or "spread", to plan how big prints should be for an exhibition, what images to include, how to hang them and in what sequence....
What I (and my artist friends too) tend to do is print out very small image thumbs and glue them on a large white piece of paper, or a real 3D model of the galley, to see what the exhibition will look like.
So, I would like to do this in PM, set up a virtual wall, with width and height, then populate that with images that can be moved and scaled on the surface. Best would be if the surface zould be zoomable, to see a part of it or the whole thing. Then when satisfied with the "wall" I would like to print it, export a JPG and be able to see what physical dimensions the images should be in real life in proportiona to the wall....if I print all walls I could very easily build a real physical 3D gallery paper model....
This could also be useful for planning a magazine spread for example, or jut communicate to an Art Director your ideas for image layout....
This could be done in something like Indesign, but its way too complicated....
Any more clear?
Rgds
PM