The Help updates for Microsoft Dynamics AX 4.0 SP1 is available under the Link provided below.
Dynamics Ax 4.0 SP1 Help Update[Require Partner source login]
The update contains over 1000 new help topics plus a fix for formatting errors in over 600 topics. This completes the work on all topics displayed through the table of contents as well as help topics for all forms reached through the navigation pane.
Most application and system classes now have information about syntax, run on values, and a list of the class’s methods. Approximately 79,000 reference topics have been updated.
A detailed list of changes made to the MS Dynamics AX 4.0 SP1 Help documentation since December 2006 is also available in the link given above