[CentOS-virt] Installing old Suse as fully virtualized guest: problem with install source

Using CentOS 5.1 with Xen 3.2. I'm trying to install a fully virtualized system for the first time and doing this with an old Suse 9.0 (this probably would run paravirtualized, maybe it won't run, anyway, because of hardware problems). I start with virt-manager and after choosing "fully virtualized" it presents me two options for install media: iso image and CD-ROM or DVD, but the latter is grayed out. I have the install source on CDs ... Is this normal or do I yet need another patch to make it work in xen 3.2?

Kai