The only significant difference, AFAIK, in SP2 help file is new Reporting features. It would be the best to keep SP1 help file for everyday use and use this one for Reporting features only. For people who is not interested in the new reporting features, SP2 help file is not necessary.

>Is available for download
>
>http://www.microsoft.com/downloads/details.aspx?FamilyId=842ACEC8-F79C-41CD-AB1A-AE4F184387C2&displaylang=en
>
>Copy your old one first - you may need it ...
>
>Take any class
>eg. XmlAdapter, Object Properties, Methods, and Events
>All the links on the properties and methods have disappeared
>
>Same for Textbox, EditBox, Collection, Grid, ...