Step By Step Guide for Migrating Windows 2000 server to Windows 2003 Server
www.windowsreference.com/windows-2000/step-by-step-guide-for-migrating-windows-2000-server-to-windows-2003-server-part1/

Step-by-Step: Migrating Exchange 2000 to Exchange 2003 Using New Hardware
www.msexchange.org/tutorials/Migrating-Exchange2000-Exchange-2003-Hardware.html