Not the best article on the topic but it gets you started…You can modify the content and format of e-mail alerts about changes made to list items in Microsoft Windows SharePoint Services by customizing XML files that are installed in the Local_DriveProgram FilesCommon FilesMicrosoft SharedWeb Server Extensions60Template1033XML directory. These files include NotifItem.xml, NotifListHdr.xml, NotifSiteFtr.xml, and NotifSiteHdr.xml, each of them defining a specific part of the overall message that is sent.