Very cool, DL, and thanks. Now I won't have to worry about burning my eye out with a soldering iron.You can use a 9v battery replacement adapter. It's a wall wart (adapter) that will have the 9v battery connector on it. You simply plug the adapter to the pir and the other side to the wall. Radio Shack should have them, but you'll find them cheaper on the net.
Click here for example.