Asterisk2billing v1.2.3

I have an installed Asterisk2billing v1.2.3 w/asterisk on FDCore 4. We are currently running traffic. I am looking for somebody who knows how to configure and customize. I wish to modify the way the billing works as well as create some new end-user products. I want to have trunks assigned to a rating system for rating the outbound calls that is seperate from the selling rate database and allows for daily updating of rate changes. I also want to bill carrier traffic that is SIP or H.323 and inbound from a cisco AS53xx and AS54xx. Experenced people only. Will pay based on mutual agreed goal achievements.