etlsport - I think you have it correct - you will still need to disarm before popping the rear door, but you will probably end up doing that anyway since you're walking up to your car with four bags of groceries in your arms.

kpaske - the factory alarm does not recognize or respond to the "option" button, so you can't just wire in the door popper to a second alarm channel. Only the in-your-garage receiver unit Zorak was talking about responds to that button.

Zorak - I think you are back where you started from - theoretically, it could work, but only if the switch operates on the same voltage as your door popper circuit (12 VDC). If you have a garage door opener, throw a multimeter on it and you'll find out. You should be able to rig up whatever DC voltage you need to power the switch. AC voltage may be a little trickier. I wish there was more help to give you, but if you've checked the "similar threads" listed below, you'll see that this topic has come up before, but it seems that only one VXer ever got the opener, and he didn't know enough about electricity to tell us how it worked and whether it could be modified for use as a rear door popper.

Good luck!!