The process for updating the portal logon page is considerably different than in past portal versions. There are quite a few good references on SDN regarding the new process. Since I encountered some slight different issues than what was documented, I thought I’d document the whole process: Setting up the NWDS environment and making changes to the logon screen.
Part 1. Installation of NWDS and Java SDK ( see document http://scn.sap.com/docs/DOC-68243 )
Part 2. Making Changes to the Portal Logon Page ( see document http://scn.sap.com/docs/DOC-68244 )
Part 3. Making Changes to the Portal Logon Page – More Advanced ( link coming soon )