virtualization in RHEL 5.3 & Centos 5.3

Hi

I would like to know how to do virtualization in Rhel 5.3 and Cent os 5.3, As i am new this Virtualization need guidence how to install and configure guest os in Rhel and Cent Os

can some one guide me step by step

Regards

Solaris8in

Go to redhat.com and download the Red Hat Enterprise Linux Virtualization Guide.