tlchris and Brian -
I found a new set of instructions on X10 Wiki:
Programming the Radio Frequency (Motion Sensor) Codes:
1 - Program each Motion Sensor to the desired House/Unit code.
2 - Push and hold the “Play” button on the UX23A until the LED on the UX23A illuminates.
3 - Push and release the “House/On” button on your first Motion Sensor. You will hear one beep and the LED on the UX23A will go out.
4 - Program the remaining three Motion Sensors by following steps 2 and 3 for each Motion Sensor.
So my 'reading into' these instructions is that it can learn up to 4 RF "triggers", but they all do the same thing: "press" (or send the IR for) Record, then 5 minutes after motion stops, "press" (send the IR for) Stop. It does not appear that the UX23A can send more than the 2 IR commands, despite the sales pages saying it can send 4 different IR commands
With AHP, I don't see why you'd need different RF commands to send the same IR from the VCR Commander (UX23A) but maybe you can think of some other reason?