Display legal notice on windows xp startup

Wanna tell your friends about the do's and dont's in your computer when they login in your absence. Well you can do it pretty easily by displaying a legal notice at system start up.
GO TO RUN
Then
REGEDIT
The see for
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]then Edit these
"legalnoticecaption"="enter your notice caption""legalnoticetext"="enter your legal notice text"