Installing CRM v4 on SBS 2003 R2 with SQL 2005 Workgroup Edition
If you need to install on SBS 2003 R2 beware this error:
"Setup requires that cumulative update package 2 for Microsoft SQL Server 2005 Service Pack 2 be installed on this computer. This update is required when you install Microsoft Dynamics CRM 4.0 Server on Microsoft SQL Server 2005 Workgroup Edition."
This update package is only obtainable from support via a web request. They actually responded to my request very quickly, but be aware of this and if needed request the HotFix in advance to be prepared!