Windows Vista SP1 stand-alone packages do not contain the updated Windows Vista SP1 Help files.The updated Windows Vista Help file packages are named "Update for Help Files."
These files are packaged separately for each language. The updated Help files have been excluded from the stand-alone SP1 packages to reduce the size of the packages. However, the updated Windows Vista Help files are contained in the retail and OEM versions of Windows Vista that include SP1. Therefore, if you perform a clean installation of a version of Windows Vista that includes SP1, you do not have to add an updated Help file.