Strange, what year is your F150? You might be able to swap a factory wheel with radio buttons and then just stick a thin remote inside the wheel to wire up the buttons to. If the cruise buttons light up at night, you could tap them for lighting the radio buttons as well.
All you'd need then is a reciver for the PC and a program like Girder to get it working.
Check this out:
http://cgi.ebay.com/ebaymotors/98-02...60161010QQrdZ1