In that last test, each window was running a seperate instance for each of the carousel and solar system.
After a quick update of my modded showbase (I left out the mouseWatcherNode for the base window - Oops!) I got the Collision demo running. So I decided to pump out different views to different windows of the only instance of the Labyrinth example.
The result can be seen here…
usera.imagecave.com/NotClever/multLab.jpg
(Again its about 140k)