A new demo has been added in the Windows XP Professional  demo portion.The detail of this demo is

Title: How to Enable the NUM LOCK Key for the Logon Screen in Windows XP

Objective: When you start Windows XP the num lock key is disable by default. This demo will show you how to change this behavior. The status of the NUM LOCK key is specific for each user, and it is disabled by default. If you want the NUM LOCK key enabled for use before a user presses CTRL+ALT+DEL to log on, you must use Registry Editor to change the default behavior. This demo will show you how to change the default registry behavior.

If you are a subscriber, then click the Demos link in the navigation menu to view the complete list of demos.