Mike, most Infocus proj. have both outputs pulsed and latched. Assuming yours has the latched you could easily do this with 3 spdt 12v automotive relays and a 12 volt power supply to provide power to the lift motor. 3 relays at $1.25 and power supply for $20 with 2 limit switches.

We build our own lifts, masking systems or whatever that needs to motorized, with these simple to obtain parts. If you need a diagram on this just let me know and I'll email one to you.

Bob