As I said, the only change that was needed was to establish the new
interface details.

So, for a recent Debian installation (version 2.2+), you need to:

* determine the network interface (INTF)
* determine the local address (LOCAL)
* determine the remote gateway address (GATEWAY)

In the file /etc/network/interfaces, change it such that there is an
entry for INTF such that:

iface <INTF> inet static
        address <LOCAL>
netmask 255.255.255.252
        gateway <GATEWAY>

Then, save that and from the console run:
] ifdown <INTF> ; ifup <INTF>

The system should then be routing currently, have the right address,
etc.

All that remains now is to add the local addresses from the newly
assigned range.

Regards,
        Daniel