The standard switch should only change whether the mast is half-height or full height. The power-antenna wire on the headunit is used to fully retract the aerial when the tuner is not on (i.e. when you are playing a CD / auxillary input)
So if you don't have an power-antenna wire on your headunit, it should raise when you turn the ignition on, and retract when you switch off.
If you want to lower it fully, you'll have to wire up a manual switch off the factory loom. I guess you might be able to use the remote wire to trigger a relay, but all that would achieve is being able to retract the aerial when the headunit is not active (& in my car, the headunit is on probably 99% of the time the car is, which would make it kinda pointless in my opinion).