Big, I have replaced a couple of screens in my I-40's
Here is a link from another site that has instructions and pictures.
You will need a very small phillips screwdriver, about the size used to fix glasses.
The display replacement is fairly easy and should only take about 15 minutes to complete.
Make sure you take the batteries out and let the camera sit a few minutes before taking it apart.
http://www.chasingame.com/forum/view...hp?f=9&t=14720
Good luck and let us know how it turns out.