0) Rupa, you are absolutely right, I forgot that.  ports was never an issue because previous gateways all REGISTERed. I will have to swap my ports around as bandwidth is not flexible.

1) I thought of this, but I have hundreds of DID, (around 600 at the moment) and maintaining that mapping in the dialplan would be a mess.  AFTER I know what gateway the call arrived on, I have a database for each gateway that helps me process from there.

2) Yes, separate profiles would work, but does sound gross.  I'm going to swap my ports around and see if that clears things up... 

-pete