A2billing Installation manual

Dear all, I used to have a2billing V2.1.1 for so long now and I would like to have another server with A2Billing installed on it, so I need someone to write the installation guide commands to establish it completely on CENTOS 6.7 VPS starting with Asterisk, a2billing & freePBX , I will be using it for PC2Phone AND calling card, so the installation manual you write should indicate the proper setup. I know that there are alot of websites that shows the installation guide like [login to view URL] yet I would rather have more of tailored reference for me. Calls will be made from FreePBX extension and being billed by a2billing . To qualify for this project YOU MUST HAVE ALREADY WRITTEN THE INSTALLATION MANUAL GUIDE AND YOU WILL ACCESS MY TEAMVIEWER AND WILL USE YOUR MANUAL GUIDE TO VERIFY THAT IT WORKS 100%