I know the subject is a little odd, as I'm asking how to wire a wireless system

seriously, my question is this: how can I wire up a wireless system in my car so I can use the vehicle power to run the WAP, but have it turn off when the Empeg turns off? Ideally, this would be the way it would work:

I install a switch in the dash, which I push when I want to use the wireless data transfer. I walk inside, upload all my songs, and I make sure I hit the "power unit off when transfer completed" button. When the transfer is done, it turns off not only the Empeg but the access point as well. The switch may need to put the unit into "home" mode instead of "car" mode, this I'm not sure of. I searched the forum for the keyword "wireless", but I got the bloody phone book. If anyone can give me a thread to follow on how to wire this up, it would be awesome. For reference, I have a Linksys wireless access point router in my house.

Thanks in advance

-James