[CentOS] Any HowTo for Getting Started With Xen?

Hi folks,

Now that CentOS 5 is out with Xen, I can theoretically take better advantage of my nice Intel processor with the virtualization piece than I can with VMware Server.

Ideally what I would like to do is install CentOS 5 as a dom0, then run my existing CentOS 4.x installation as a domU while I figure out how to do other interesting things (like install Solaris 10 and Windows as domU installations).

Does anyone have any links to pages which might show me how to use Xen to run an existing, already-installed CentOS (or RedHat) under Xen as a domU?

Thanks for any links or hints you might have.