I loved the 3.0 one we did for Small Business Edition that you were able to modify to work with a client's installation.

The Microsoft Dynamics CRM 4.0 User’s Guide includes all of the basic end-user information available in Help, including documentation on sales, marketing, and customer service features, as well as step-by-step instructions on working with Advanced Find and workflow in an easily printable format.

To make it easy to customize the document, a version is available in Microsoft Office Word 2007 (.docx) format along with the entire document in PDF format.

 

Enjoy!

http://www.microsoft.com/downloads/details.aspx?FamilyId=0DB4D487-1BAA-4619-9BC5-074D73C3997D&displaylang=en