To get under the screen you have to take off the four little pads in the corners of the screen.
Take out the screws
The screen is then clipped together so you need to slide your nail arround the edge to unclip those
The screen also has stickey stuff holding the frame on so go slow and gentle.
That is the frame but then the actual LCD cover I have not removed. I only wanted to look at the webcam.
edit: This is on a TR1