Application Server and DLL


We have alrady a lot of expirences programming in Delphi. We work
aktive  with an Client Server (3 level Application). Our Application
Server run on an huge NT-Workstation. The Server *.Exe waste so much
Memory. In Case lots of Users are logges on, the memory is fully used
and new users where droped. We read, that you can exclude a DLL from the
Application Server. So you have a smaller EXE , and the DLL is shared
used from the user.

How can I create ( exclude) the DLL from the Application Server?