Microsoft released Notification Services 2.0 Service Pack 1 (SP1), a standalone release of Notification Services. If you have an existing installation of Notification Services 2.0, you install SP1 side-by-side, then upgrade existing instances. Instructions for upgrading instances are in the Readme.txt file. Detailed instructions are in the "Upgrading Notification Services 2.0 Instances to Notification Services 2.0 SP1" paper, available on the Notification Services Technical Resources Web site at http://www.microsoft.com/sql/ns/techinfo/default.asp . You can read about the changes in SP1 in the Readme.txt file available from the download page at http://www.microsoft.com/downloads/details.aspx?displaylang=en&familyid=79B34DA2-185F-455C-9365-96FFBC6DA608 .<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />