[SR-Users] get server parameters from DB when kamailio starts

Hi again... (i do find myself ask many questions these days.... :-)) well, now here is one more: i have 2 kamailio servers that i use in 2 locations. both use the same tables and DBURL. each of my server turns to a number portability (NP) server at its same location. for example, if server 1 has the call, it will turn to NP server 1 with the query, and if the query fails, it will then turn to NP server 2. the kamailio server 2 does the same. but, turns to NP server 2 first and if it fails, to NP server 1. once this is understood.... here is my issue - i want to have 1 generic cfg file for my 2 servers. today, i use the same cfg file, but in server 1 i set it in the cfg to its group, and on server 2 the same but a different group.... i tried to understand how do i get each server to "pull" its group from the DB. something like "what is my group when my IP is X.Y.Z.Q ? i raed the cfg_db module but didn't understand how to set it on my cfg file and on the DB. what is the best way to do what i want? hope i was clear.... BR, thanks to all the guys that help me so far, i appriciate it a lot! Uri