Not sure how to do this tricky install...

[Chris Csanady]

This is only somewhat related, but would it be possible to have
the getty on ttyd0 enabled by default, at least for the install cd?
I haven't tried to log into the installer account over the network,
but this does sound like the best option if you have a dhcp
server in place.  If you do this though, don't forget to configure
PermitRootLogin to yes in /etc/sshd_config before you reboot,
otherwise you will be locked out of the machine before you can
finish configuring it.
Chris