I used the No Starch Press "Book of Xen" as a starting point to learn more about Xen and begin a dom0 installation as described therein. Through failed installations and subsequent searches I learned that Red Hat / CentOS no longer supports Xen in favor of KVM. After playing with OpenSUSE I'm running into silliness there too - so -
Rather than continuing to pull out my hair I thought I'd do what I should have done to begin and ask for recommendations on the lightest weight and simplest installation for a Xen Dom0 installation - based on current kernels...
BTW - My intention is to run Win2k8 and RHE for DomU.