How to: adding clients to a new server installation?

Hi everybody

I have often wondered about a problem

We are administrators in a big company, and by so, we often set up new servers in different departments

The server installation goes quickly and painless, but when we have set up the server, we allways have to come around each client pc on the network, to join them to the new domain, set up Outlook to the new server etc

Is there a way to do the "Client part" a bit faster
What if we have 5000 pc's in our network? It would take days before we have come around each client pc..

We look forward to hear from you

P.S. We know all about MS Remote Installation Services, but this also include, going around to each client pc, booting them up on the network

Kindly Regard

Thomas Holme Larsen