David
Have a look on Eddie T's Astroshed site and you will see a version of a Lightbox, also, have alook here:
http://www.astrodon.com/oldsite/LearningCurve.html
There are others if you want to chase them up.
Good luck, I can't see why it won't work so long as the area that is lit is even and full frame.
JohnG
