Right now I have a Sirius Satellite Radio, Starmate 4 in my car. My question is if I buy the whole setup kit again and install it in my girlfriends car can I put my radio in there and it work too? That way no matter who's car we take when we go out, we can always listen to Sirius, without having to buy another unit. Just wondering if this was possible or if Sirius had a way of blocking this to make more money? I know when you activate it you just give the Serial number on the back of the actual unit. Anybody done this before? Just don't want to buy another kit and it not work in her car. Thanks.