use wss 3.0 with sp2

WSS 3.0 with SP2
Differences between WSS 3.0 and MOSS 2007
How To Install Windows SharePoint Services 3.0 On SBS 2003
How to install Windows SharePoint Services 3.0 SP1 on Vista x64/x86

Connecting to WSS 3.0 SP2 database instence Microsoft Sql Server Embedded Edition <=> Microsoft##SSEE
WSS 3.0 and SQL Server Embedded Edition

More on customization
How to Customize SharePoint Forms – Without Writing Code – Part 2
Filtered Lookup Lists In Sharepoint
SharePoint 2007 – /_layouts and how to create pages that run in site context
Implementing Masterpage in MOSS
Create a site master page
Sharepoint Inspector