seeing as you bought a license why the older 5 series
also 5.5 is not the current in the 5 series
5.6 is
RHEL 6.1 is the current
use yum to install the software from RHN
instead of google how about the support you bought with the REQUIRED license
http://www.redhat.com/support/
https://access.redhat.com/knowledge/...erprise_Linux/
-- for the rest of the site you will need to use the user name and password you set up when you registered your copy of RHEL