Hi, Thanks for using our site. I can help answer your question.
The lifecam should come with an adjustment on the back of the camera so you can let it hang on the screen.
It will not hold tightly, just hang on the screen lid when open.
Take a look at this image to see how: http://www.everythingusb.com/media/ms-lifecam-cinema-positions.jpg
Please let me know if that helps you. Thanks.