rpm -qa
will tell you what all is installed on the machine at the moment, or 'yum list installed'
Just figured that out! I will re-install my way and then without modifying anything and run this command before and after installing Xen.
also, w.r.t your other question on the centos list, xen in centos-5.1 is already xen-3.1
I have only been using CentOS 5.1 and it wants to install Xen 3.0.3. Does 3.1 maybe exist in a different repo? I haven't enabled any other repo's.
Thanks! jlc