seeing as this is RHEL 6 .I suggest you use the red hat support
RHEL is not free .
The RECOMMENDED standard 1 year contract is $299/ year and IS RECOMMENDED ( now there is a $49 version) if you are going to use red hat .
if not then install CentOS 6 or ScientificLinux 6
Both are free rebuilds of RHEL 6 - BUT YOU
are the support staff , there is none provided to you .
Now if you do have a support contract then use it to login to the red hat web site and search the rhn knowledge base
for the key word " vmware"