I too have been working on this same concept. I am beginning with basic design. I will only use the X and Z axis to start. I think I can use Irfanview in batch mode and then use the mach 3 and power point script to show the sliced images and move the projector along the X axis. At first I will just move the projector over (1) position to try and double my build size. However I have 37" ofby Torrick - Skeinforge