A Dark Theme for Windows 8

Is there any way for me to use Windows 8 in a dark environment? For a long time I had headaches that I couldn’t fid their cause. Now, I’m using a dark visual style for my Windows 7 and since then, I haven’t have any problems. Now I want to use Windows 8 release preview but I cannot find any way to use it in a dark theme/visual style. I’ve seen the files needed are patched but couldn’t find any visual style. I also searched for 3rd party apps, nothing.
I would very much appreciate if you could help me. Thanks.