A new whitepaper providing step-by-step instructions to install Enterprise Portal 4.0 and all the necessary technology stacks is now available at http://download.microsoft.com/download/b/8/9/b89bec6d-7d56-4b41-a1b7-cfb9fb67a6db/Install%20and%20Configure%20a%20Microsoft%20Dynamics%20AX%20Enterprise%20Portal%20server.doc

There is a great deal of AX 4.0 documentation available at "Using Microsoft Dynamics AX" site  http://www.microsoft.com/dynamics/ax/using/default.mspx