Howard:

It's funny you mentioned an "on-the-fly" pose file, because I was thinking along the same lines via python. While python has limited capabilities to control/alter a character's JCMs, a script could certainly do something like this:

1. Let the user associate a char with a JCM/Crosstalk fixer pose file
2. Modify the Figure number line, and create a new, temporary pose file "on the fly"
3. Apply the temp pose file to the figure after it's loaded into the scene.

Anyways, food for thought, I guess. Look forward to your utility.