thanks for your replies.
I don't get as far as page 3.
At the bottom of page 2 I get to:
Now reboot the system:
shutdown -r now
At the boot prompt, Grub should now list Xen 3.0 / XenLinux 2.6.12 as the first kernel and boot it automatically. If your system comes up without problems, then everything is fine!
But the system doesn't come up ok. During the boot up into dom0 it has the NFS error.
I tried removing nfs-common in the root install, but it wasn't installed.
I did find somone with a similar problem at :
Which made me think something might be wrong in the grub config.
Thanks for your help.