A word of caution.
A mate at work tried to replace one recently and made a complete mess of it. The problem is that the ribbon cable needs to go through the hinge assembly and he found this is a bit tricky to do. He managed to tear the ribbon while trying to get the routing right. Of course that was after he got adhesive all over the new screen while trying to transfer the foam surround from the other one, and after losing one of the springs from the shoulder assembly. On top of this, somehow he managed to snap the power switch as he took it apart.
Perhaps he's more clumsy than most, but it's probably worth reading a few guides first.