Ringtones for Known and Unknown Callers

[ocbizlaw]

I used to have a Treo 800w. Worst phone I ever had, but I digress. One thing it had that I liked was that in Settings:Sounds and Notifications:Event it had known callers and unknown callers. So, you could specify different rings if someone called who was not in your contact list and a different ring for people in your contact list. If you already had a custom ring specified for a contact, that ring would override the default.

So I had many callers with specfic rings assigned in contacts. But, I really liked the fact that when the phone rang I always knew if the caller was in my contracts or not by the ring.

The Diamond does not have the option in Settings:Sounds and Notifications:Event. It only has phone incoming call. I assumed it was a function of WM 6.1 but I guess not or it was left out of the stock Diamond. Is there a way to get that option through a tweak of some kind?