Rewriting/Filtering Attributes based upon NAS-IP or NAS-Port-Type

I'm sure other have this problem, I've got Free-Radius Running for Wired Users against an OpenLDAP database, but need to now add some functionality for my Wireless Users. I need to (preferably based on NAS-Port-Type) look for an existing Filter-ID (passed from OpenLDAP) and remove it, but replace that attribute with three attributes to support RFC3580 Basically if the port is "Wireless", I want to trigger VLAN moves based upon the Filter ID already existing (and passed) by OpenLDAP. I saw the doc files on attr_rewrite but have been googling and searching from some example of how I implement this within the DEFAULT realm. Anybody with an example or insight into how this be accomplished, THANKS in ADVANCE!! Bill