Go back to my original response, and find the run/prog switch on each engine.
Power off
Set switch to (PROG)
Place engine on track
Turn on power to 18VAC
On the remote, press (ENG), 83, (SET), engine should respond with a horn.
Turn off power
Return run/prog switch to (RUN)
Engine should now respond to (ENG) 83 (AUX1)
Repeat steps for engine #32