Ring tone for Google Voice

Is there any way to change the ring tone for Google voice calls?
If anyone can help me, It would be great.

Thanks
:confused:

You might be able to do it if in GV you go to Settings -> Calls and set the incoming caller ID to Display Your GV #. Then on your BB create a contact and call it anything you want (Google Voice) and assign a ringtone. The drawback is you won't know who's calling unless you set GV to announce the caller.