BTW, in case anyone else wants to use a WD13A in AHP, you'll notice that it isn't a supported module. I added it as a HP564 Personal Alert Remote (in the Security category) because it sends 2 of the security messages supported by that module. When creating macros for the device, "PANIC" is the trigger when it detects water and "Disarm" is the trigger when the probes are dry.
This and my DS10A are literally the only X10 devices I have in AHP and I'm only using AHP for these because the SDK (COM interface) doesn't properly relay security RF messages.
This might be good info for the X10 wiki, but alas, I do not have permission to edit.