Set the default ringtone?

Version 1
    This document was generated from CDN thread

    Created by: Peter Vincent on 12-10-2010 11:07:10 PM
    How can I set the default ringtone ? Is this possible with IPPS?
    I know how to play a sound file but that's not really what I want. I want the phone to ring with one of the many .raw files that are available to me. (I'm guessing the standard phone sound is also a .raw file)
    if not possible with IPPS, is there any other SDK or API that allows me to change it?