Guy Palmer,

Using PEP2, at the top of the action list panel, check out the tools. You can set relays and sense power.

There is a constant voltage output on the RFX9600. This can be wired through a relay contact and sensed by an input pin. As you switch the relay, the power sense pin will toggle and an action will execute or not.

This will not be a perfect scheme because someone could use the projector's native remote or press the power button causing, the relay state to be out of sync.