[Fedora-xen] Running FC4 Guest on FC5

[Robert Mortimer]

I can set up and run FC5 guests on FC5 but I want to run a FC4 guest under
FC5 to trial zimbra. I have tried the FC4 howto and made a FC4 image but I
can't get to boot.

The new xen config file seems to use a python bootloader and the old system
references a kernel to use.

Does the boot kernel for the guest have to reside on the host as well as the
guest?
Are there docs on the Python boot system?

Any pointers welcome
Robert