I really think that you would be better off asking that in the
networking group:
news://msnews.microsoft.com/microsoft.public.win2000.networking
Not that there are not knowledgeable people here to help you but there
are more network savvy guys on the other group and there are all kinds
of intricacies when adding subnets and little tricks of the trade might
come from the network experts. This could turn out in a rather long
discussion.
It's sort of like fishing... as an old timer once told me, "To catch
fish you gotta go where the fish are. To know where the fish are you
gotta think like a fish." ;-)
(I hope the guys on the networking group don't think that I think of
them as fish!)
John