I have both the Light Games LCD Color Projection System by Playtime and the Grandstand Light Games LCD Colour Projection System by Playtime. They look similar, but the plastic cases are a little different between the 2 units (maybe a different ROM revision?). I have 6 LCD carts (similar to R-Zone), that have a window / lcd that is projected on the wall. Baja Challenge, Knock Out, Karate Master, Soccer, Stealth Fighter, and Temple of Terror. Everything seems to be working.
The games came with button overlays for the color projector, and I have the overlays for Stealth Fighter and two overlays for Auto Race (which are surprisingly different). I do not have the Auto Race game though.
I also have the original instructions for projection system and Stealth Fighter / Ninja Attack Yes, they only made a single instruction card for both games.
I'll open up one of the projectors to see if I can dump anything. I will probably have to send off the carts though to get dumped.