Convert RHEL to CentOS

Hi

        Recently i was installed in my desktop RHEL 5 and I was tried to upgrade. On the time it asked Searial Key.  I was tried what the key mentiond in the DVD, but it has not taken. So i decided to convert RHEL to Centos. I Done Using following Steps.

Remove the redhat-release and yum-rhn-plugin repo

rpm -e --nodeps redhat-release
rpm -e --nodeps yum-rhn-plugin

Download the key from

http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

Install the RPM-GPG-KEY-CentOS-5

rpm --import RPM-GPG-KEY-CentOS-5

Download and Install the following rpms in this site  

http://mirror.centos.org/centos/5.6/os/i386/CentOS/

centos-release-5-6.el5.centos.1.i386.rpm 
centos-release-notes-5.6-0.i386.rpm   
yum-3.2.22-20.el5.centos.noarch.rpm
yum-updatesd-0.9-2.el5.noarch.rpm  

Then

Yum clean all

Yum upgrade

Your Centos will upgrade

Have the Centos update with help of Redhat Package