Upgrade from CRM 4.0 to CRM 5.2

Hi All,

We are in the process of upgrading CRM 4.0 to CRM 5.2. But I am unable to find a single upgrade document for CRM 5.2(SAP CRM 2006S) in OSS.. I could find it for others say, CRM 2005 and CRM 2007, but not for CRM 2006S..

Can anybody help me on this?


Thilip Kumar