http://blogs.technet.com/beatrice/archive/2008/10/01/sql-server-2008-cumulative-updates-and-slipstream.aspxI've posted some time ago about Slipstream of Service Packs on SQL Server 2005 - which was and is still not available - so basically with 2005 it is not possible to have the Update/SP and the RTM included together in a single package. This was a featureit-ITCommunityServer 2.1 SP1 (Build: 61025.2)