[ale] What'v'I got with SuSE-10.1 'XEN' boot option

[johnmills at speakeasy.net (John Mills)]

ALErs -

I installed SuSE-10.1 and I notice an interesting boot option in the GRUB 
menu: 'XEN'. It supposedly starts up a kernel '/boot/xen.gz' with two 
"modules": '/boot/vmlinuz-xen' and '/boot/initrd-xen'.

I expect I checked 'yes' somewhere in the installation to get this setup, 
but don't recall where.

What is this option and what can it do for me? The question isn't entirely 
academic: I'm setting up another system where I would like to run a legacy 
Linux (based on RH-7.3) as a virtual OS on that machine. Am I looking at a 
useful tool for that purpose here on the SuSE boot screen?

TIA.

 - Mills