We are working on a new Distro Install Process as we speak. The plan is to let you go through the normal Centos Setup screens with a full Centos ISO and than we will prompt you with a payload/version option for what version of the Distro you want to install and it would pull down
Aug. 11, 2011 The FreePBX development team has identified with some zero day security vulnerabilities related to httpd and php. These vulnerabilities may allow a remote user to gain full root control over a system, and are present in lots of popular asterisk-related distro’s. The FreePBX development team strongly urges all user of the FreePBX