How To Install MSN Messenger
For Windows Vista/XP/2000
1.Please log on to http://messenger.msn.com to download.
2.After the installation package is downloaded to your computer, it will start installing MSN Messenger. All you have to do is follow the instructions.
3.After the installation is completed, click Start, point to Programs, and click MSN Messenger.
4.After you run Messenger for the first time, you can add friends to your list and send instant messages.
How to use the camera with MSN Messenger
1.Plug the PC camera into your PC first.
2.Click the “Messenger” 
to go to the main screen
3.Click the Webcam icon 
during a conversation. Or, click the Actions menu on the main window, click Start a Webcam
Conversation, select the name of the person you want to send video to, and
then click OK. For a
4.To stop sending your video image during a conversation, click the arrow under your video window, and then click Pause Webcam or Stop Webcam. You can continue to receive the other person’s image, but your image will freeze in your contact’s conversation window.