I'm going to need some more information to fix this bug. Can you give the heading of the section in the 5.2 virtualization guide and a more detail description of the error?
IA64 hvm loader is in sypplymental disk, and it doesn't installed by default. But virt-manager shows full-virtualized install option when the system doesn't have hvmloader. It causes an error and confuse users. I think a short note in virtualization guide helps users. thanks,
Cheers, I can fix this for 5.3 or the fix for 5.2
http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html-single/Virtualization/#form-Virtualization-Installing_Xen_packages_on_an_existing_Red_Hat_Enterprise_Linux_system-Installing_the_Xen_hypervisor_with_yum