A. A. The tips that NT displays are stored in key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Tips, and can easily be edited using the registry editor. You will notice that the names of the values are incremented by one so to add a new tip just either edit an existing one or create a new value (of type string) and set its name to the next available number.

The tips are displayed sequentially and the counter is stored in HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Tips\Next and can be changed if you want. The values are stored in hexadecimal.

To control if tips are shown set the value HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Tips\show to 01000000 to display and 00000000 to not display.