Virtualization (Xen) with RHEL Workstation subscription

I have a RHEL Workstation subscription, currently running RHEL5.10. I have been using Parallels Workstation Extreme to run a Win7 Virtual Machine, but since Parallels has stopped offering/supporting it, have been looking into other VM options. It looks like Xen might be a good option to replace Parallels, but I have been having trouble figuring out whether I can use Xen that RHEL provides with my Workstation subscription. Can anyone help? If it is available with the Workstation subscription, what do I need to do? I've checked yum and can't find the Xen packages. Thanks!