Welcome to KORG!

What you want is fairly easy. Create a message text file on a share somewhere that the users have read access to. You can employ the following code:
 Code:
; MOTD for all users
If Exist('\\server\share\motd_all.txt')
  Display '\\server\share\motd_all.txt'
  Sleep 4
EndIf
; MOTD for users of the XXX group
If InGroup('XXX')
  If Exist('\\server\share\motd_XXX.txt')
    Display '\\server\share\motd_XXX.txt'
    Sleep 4
  EndIf
EndIf
This displays the message file if it exists, delays a short time, and then displays messages if users are members of a specific group. The group-specific code can be repeated as many times as necessary to accomodate different groups.

You can use MessageBox() to pop up a box, or simply a
 Code:
"Press any key to confirm:"
Get $C
?
code fragment to wait for an acknowledgement.

Glenn
_________________________
Actually I am a Rocket Scientist! \:D