First Read this blog post: http://blogs.msdn.com/ecm/archive/2007/05/12/anonymous-users-forms-pages-and-the-lockdown-feature.aspx and this technet article http://technet2.microsoft.com/Office/en-us/library/f507f5d6-4c9d-4f98-909f-069c53b9a3f61033.mspx...