For now I'm happy with it. I actually removed some items from it like the weather and phone because I have no use for the right now and for some reason the weather skin keeps on freezing my computer.
Here is a screencap of the playmode screen by night with spectrum analizer in it. The analizer actualy sits behind the skin. I found no other way to make it happen. Maybe you can?
I'm not really happy with it yet because the large volume buttons seemed to be a good idea running on my desktop but once in the car the little ones on the bottom are more handy. So I'm planning on changing this and make it look more like the actual audio player screen but with analizer. But it will give you an idea of what it looks like and how the nightskin looks.
If you are interested I can make a zip file of the entire nightskin and post it. But you will have to make some changes to it because it's not quite the same as the original anymore.