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

Title: How to Enable or Disable the Visual Effects in Windows XP

Objective: This objective of this demo is to teach you how to enable or disable all or parts of the visual effects in Windows XP. The new Windows XP interface is enabled by default in the Home Edition and Professional edition. You may want to disable some of the visual effects in order to improve the computer's performance. You can enable or disable portions of the visual effects by clearing or  selecting a check box.

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