bugner

This may be a basic question to you all but answers would be very useful. We currently have a small Windows Server 2000 network and are looking to move to 2003. Is it possible to build the new 2003 architecture exactly the same as our existing 2000 one and then just replace all the servers ? Will this cause any problems ? What is the recommended process for upgrading from 2000 to 2003 ?? Many thanks