[Serusers] fr_inv_timer_avp on the fly....

Can anyone think of a way, perhaps using AVPs, perhaps using a custom module, that I might do something like set fr_inv_timer_avp on the fly to a value pulled from the database? I was looking at the AVP commands, and I couldn't figure out a way of grabbing a number of seconds from the DB (that part's easy enough), storing it into an AVP, and then storing the value from that AVP into fr_inv_timer_avp. Now, storing statically is easy enough... at the top of my ser.cfg, I have: modparam("tm", "fr_inv_timer_avp", "inv_timeout") And off inside the cfg, I've got: avp_write("i:45","inv_timeout"); ... to write a static number of 45 seconds to the inv_timeout. That works. I'm just trying to think of a way to make it dynamic, storing a value for that number of seconds in the DB, and retrieving it on a per-user basis (so each user could set his individual timeout values should he so desire). Maybe I'm just not thinking about this correctly. Anyone have a direction I could try? N.