OS X 10.5 and 10.4(.11)

Vista

Linux/Ubuntu 7.10 Gutsy Gibbon

Stop network manager

sudo /etc/dbus-1/event.d/26NetworkManagerDispatcher stop
sudo /etc/dbus-1/event.d/25NetworkManager stop

Create these files:

echo "exit" > /etc/default/NetworkManager
echo "exit" > /etc/default/NetworkManagerDispatcher

Once you do this you will have to setup your machines network manually.