Or if i can make a suggestion...
I recently moved from one server to another with my ispconfig
which worked magically.... all i had to do after creating the clone was this...
change or delete /etc/udev/rules.d/z25_persistent-net.rules (will
be regenerate on boot) to the new NIC is eth0
Offcourse the above to items are for Debian Etch or Debian based distributions.
and rebooted the server and the clone was now the live server and i havent had a problem with the clone since.
It seems as well it will allow for large drives as well, i went from a 80 gig drive to a 400 gig drive with ease.