This is really easy, and just amounts to tearing apart your screen, flipping over the reflective part, and putting it back together.
Actually, the biggest challenge was being a little creative about hanging it.
You'll need a little computer screwdriver and some scissors, plus whatever you plan to use to hang it. I'll leave the hanging to your own devices.
Step 1: Disassemble
The big white strip (green on the other side, pictured) that says "do not touch" should be cut off with scissors.