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

Title: How to Make a File or Folder Hidden in Windows XP

Objective: The objective of this demo is to teach you how you can make your files and folders hidden from other users in Windows XP. You can make your files and folders hidden from other users by simply checking a check box. You can then make hidden files to show and see your files. The files or folders that you set hidden are disappeared and thus cannot be seen unless you enable hidden files to show up.

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