Thanks for the response. In "Installation Requirements" it says:
"***Please do not install services such as Apache, PHP, MySQL, Ftp, Sendmail, etc., as we will do this for you. All we need is a CLEAN install of your operating system.***"
I have tried and it seems that not installing sendmail is quite an issue. Does it really matter? CentOS will install it no matter what.
So minimal install is the way to go with CentOS? Sorry I have never used it before. If I enable the firewall during install does it just create iptables rules that can later be changed with apf or kiss or is there a tool to be used in CentOS. Sorry for all of the questions but I have always used Debian or FreeBSD with no CP.