[one-users] Xen images

[Gandalf Corvotempesta]

Hi,
i'm, trying to create a Xen test machine with no success.
I've made an image with ubuntu vm-builder.

This is the image template:

$ cat ubuntu-xen.conf
CPU      = 0.5
MEMORY   = 128
NAME     = "Ubuntu 10.04.4"
SOURCE   = "/tmp/ubuntu-xen/ubuntu-10.4.0.img"
OS = [ KERNEL     = /vmlinuz,
       INITRD     = /initrd.img,
       ROOT       = xvda1,
       KERNEL_CMD = "ro xencons=tty console=tty1"]
DISK = [ IMAGE     = "Ubuntu 10.04.4" ]
NIC      = [ip="192.168.0.101",bridg="br0"]
GRAPHICS = [type="vnc",listen="127.0.0.1",port="5900"]


but there is no way to get this working.
Do you have any guide to follow step by step about image creation for Xen ?
I would like to create an ubuntu 10.04.4 (this exact version) image
starting from a debootstrap.