OK, here's my attempt to add a little to the thread.
Here's the programming procedure from the manual. Sorry for the quality. Just a little more detail than the procedure from MJL (thanks MJL). According to the manual only 3 transmitters can be stored in memory. It appears it should be possible to just add 1 key since our cars come with 2 transmitters.
Anyone have an idea of where the "power window master switch" is? I've looked at diagrams in the manual, and my best guess is the drivers' door or front driver side fender behind the wheel. Maybe it doesn't make much difference as long as your battery is good. BTW, thanks 06accord.
PS - Did you ever notice there is a small led on our key. Tells you that the battery is good. I guess I never noticed since it's always in my hand (or pocket) when I'm using it.
