What you want to get past is your idea of "Not booting into Windows". That's why I had you pull the network cable prior to the first boot. Your registry edits will take effect on the second boot when your network cable is plugged back in, thus avoiding network addressing and licensing conflicts. You walk around to each machine twice, but this is an efficient loop because each machine needs time to initialize anyway. Your floppies are labeled with the machine that they are for, this is because you'll be doing this over and over for individual machines as specific machines get messed up by your customers. By the way, I have actually done this many times. One warning: some machines will fail to take the multicast the first time for unknown reasons. Usually a second session will pick up the failures just fine.