Sites across wan

Archived from groups: microsoft.public.win2000.setup_deployment (More info?)

Building A is 30 miles from Building B connected by high
speed Wan (atm). Running plain Windows Server 2000 not
Advanced Server 2000.

Would like to add server in Building B to domain in
Building A. This domain(X)is a second level tree in my
forest just below Domain (Z)

I believe I need to create a NEW Site, New subnet, and New
link, but AD Sites and Services does not present the new
option for these functions. I noticed that the servers at
the top of my forest have these functions.

How Do I do this?
Kb articles and any possible help

Thanks