Not necessary with CentOS 5.x
CentOS Installation
For the server, I used Centos 4.4 as it has a single server-only install CD. For simplicity, I used the "minimal" package configuration option. After CentOS has installed and you've rebooted the machine, update what's there:
yum -y update
Then start installing the software we'll need for OCS Inventory-NG:
yum install mysql-server
yum install httpd
yum install mod_perl
CentOS Repository at CentOS.Karan.org