See bug #2743 "Note: A GINA solution will be limited to Windows Server 2003: 2008 does not use GINA any longer. It seems like it can accept the PIN over RDP though, see http://msdn.microsoft.com/en-us/library/aa912575.aspx. But, right now 2003 is much more interesting than 2008." http://msdn.microsoft.com/en-us/library/cc240475(v=prot.20).aspx INFO_PASSWORD_IS_SC_PIN
*** This bug has been marked as a duplicate of bug 3393 ***