What I'm doing is acutally using my axim to control a laptop. the laptop being the carputer. The program I'm using is called Xlobby (
www.xlobby.com). It's very customizable and alot of stuff can be adapted to it. Did I mention its free?
I think you can see what I'm doing in a link in my sig and you can go to the website and check out the forums there and it's just great.