To pop a banner which can contain any message you want to display just before a user
is going to log on, go to the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Polic
ies\System.
Now create a new string Value in the right pane named LegalNoticeCaption and enter
the value that you want to see in the Menu Bar. Now create yet another new string
value and name it LegalNoticeText. Modify it and insert the message you want to
display each time Windows boots. This can be effectively used to display the
company's private policy each time the user logs on to his NT box.

enjoy!!!!!!!