Centos is one of the silent Linux Distro Used for servers. In my opinion centos is one of the most stable O.S. on which you can rely on. The latest version is centos 6.2 . The installation is little bit changed in this version as we do in 5.5. I have choose 4th option i.e. URL for installing centos which you can see in below screenshot. Your computer should be connected to internet for installing this method. The e.g url for this method seems like ” http://mirror.centos.org/centos/6.2/os/i386/” . If You give path like this ” http://mirror.centos.org/centos/6.2/os/i386/centos.iso” You will probably meet error. So put the source of centos os as in first option.
And go through the video for full Installation guide below.