You need a saw to cut the cd-rack, screws and wood. No special skills or something complicated. :)
cutting the cd-rack. To make a straight and uniform cut you should mark lines on the rack, so you can cut it into equal pieces.
I had just small screws, so I needed three for every piece. Draw lines on the wood carefully, so that it looks nice and clear.
Now you can mount the whole thing on your wall. That´s it. Easy, isn´t it?