It's been a lot of work, but I'm happy I finally managed to finish this project. Now you can also make your desktop look like you're playing a game of Left 4 Dead!
The HUD skin is very customizable: the main weapon can be changed to fit the current wallpaper, every launcher (there are over 15 of 'em) can be assigned to a program, folder, URL, registry key or Rainmeter !bang, the D Drive usage meter can be replaced with a battery meter for laptop systems, etc.
The skin will adjust itself to your screen resolution, and you can easily change the various functions of the skin. It's your desktop!
There are also 10 widescreen wallpapers included (in-game L4D screenshots without HUD). Of course, you may also make your own!