Is there any way to designate from the client side of things, values for
certain attributes such as Building, Room, phone number, Department,
etc? E.g. setting certain values in a registry key, creating an .INI
file, or specifying attributes at the commandline or something like that?

It would be nice if we could run a customized version of the installer
on a group of workstations so that when they import they are already in
a specific group so we don't have to do that later.