Before starting to talk about the installation process……
You will read numerous terms in this site that describe sharepoint products, so to avoid any ambiguity, I will use the following naming conventions:
1. WSS 3.0 will refer to Windows SharePoint Services V3.0. (Previous version is WSS 2.0)
2. MOSS, SharePoint Server 2007 and SharePoint 2007 will all be used to explicitly refer to Microsoft Office SharePoint Server 2007. (Previous versions SPS 2003 and SPS 2001)
SharePoint Server 2007 is part of the 2007 Microsoft Office System—a suite of desktop and server products designed to work together and streamline the way people work.
Live Communications Server
Project Portfolio Server
SharePoint Server Search