If you are fan of Transformers, that here is a theme pack for Windows 7 and 8 to color your desktop with awasome wallpapers based on upcoming Transformers Fall of Cybertron.
Themepack contain 4 wallpapers in 1920×1200 resolution. They would be displayed on your desktop. In addition, theme also changes the default logon screen with custom wallpaper (Falling Cybertron), you can see it in above snapshot. It is displayed when computer starts an shuts down.