Deprecated Features in SQL Server 2005 Reporting Services
If you're searching for Office Web Components rendering extension in the 2005 version of Reporting Services you may not find it. This is because is a deprecated feature.
If you need to re-enable it and/or you'd like to know what other features are deprecated you can read this document:
http://msdn2.microsoft.com/en-us/library/ms143509.aspx