I have a working installation of Asterisk 1.8 on Cloud server with Centos 5.6, with Freepbx 2.9, Webmin and A2billing last version. My plan is to sell bundle packages (no calling cards), so I need some customizations, like A2billing integrations with Authorize.net Gateway, integration with features from freepbx like follow me, IVR and editions of Voicemail, etc. Eventually I want to install Wordpress for ease the design part, but I would like to integrate with a2billing too with just one lo...