[CentOS] Centos 5.3 32-bit and xen 3.4.0

Hi,

I have a question about config file, if I create a guest bu using a 
virt-install, where the config is saved? I would like edit the config 
and add second disk to the virtual machine.

When the root machine is a reboot, the all guest is running 
automatically, I was looking in /etc/xen/ but ther I can't find.

For at ll