We cannot find the hex ir codes to make the input selection work, and Xantech's PCIR can't learn the ir code from the C3X remote. Acts like it learns it but it doesn't. I've been told that Sim2 uses "toggle bit commands" whatever that is. If I had read the IR limitations of this supposedly top-of-the-line projector, I would never have bought this piece of crap! Now it seems we have to can our theater control system and get something that communicates through an RS232 adapter. Unbelievable, compared to the simplicity of the Marantz projector we just replaced -- great picture or not.