Of course the big ugly number is unique to the interface/NIC card, thus rendering a reg import impossible. Any ideas or a little C program out there?
The reason for disabling the AutoConfig is that if the DHCP is momentarily down when XP boots, it will (try to) keep it's previous IP address, instead of inventing a 169.*.*.* address. The reason for enabling the icon is that I like to have some idea of how the traffic is going.
EDIT Updated to include reg address posted below.