Installation of Windows XP Royal Noir is a breeze. Just download the Royale Noir package and unpack it on your computer. The contents have to be moved to windows\resources\themes\royal noir. A click on the luna.msstyles file should be located in the royal noir directory will activate the theme and bring the Display Properties to the front.

Officially titled "Windows Classic style", this is the built-in look and feel of Windows that was used in previous versions of Windows prior to Windows XP. It is used when the theme service is disabled and in certain other scenarios, such as Win32 console windows or booting the system in Safe mode. Classic style widgets are also used for applications that are not theming-aware even though theming is enabled. It is less CPU-intensive and offers better performance,[11] due to which it is also used by default on Windows Server 2003 through 2008 R2.

Windows Xp Royale Remixed Theme