to be precise a) how do I go about combining two AVPs ? b) how can I change the value (string manip, to be precise) the value of an AVP? c) how can I do (b), based on the content of a different AVP? Ideally, the answer isn't "write the code to do this" The <hack>method</hack> that I came up with was a) write the AVPs I care about to a custom header b) resend the request to myself, and then use 'subst' (or equivalent textops command) needless to say, urghk. anybody? cheers