[vash]

i do it differently:

hook up gauge btwn WUR and FD. valve on WUR side of gauge.
disconnect wire @ WUR. jump FP (term 87a and 30). valve open note cold control pressure.

shut valve, and note system press.

hook up wire at WUR, remove jumper at FP term, and START the car. oh, valve on gauge needs to be open. let the car idle and warm up. you will see the pressure move up. after about 5 min, the pressure stabilizes and note your warm control pressure.

then shut off the car, and your pressure will immediatly drop. after about 20 to 30 mins, it should stop. this is your at rest pressure.

(from memory, so PM me and i can fax you directions from my home. but i think i am right)
make sure all hoses and various accoutrements are out of the way of moving parts.