Royale Noir is a theme that was developed by Microsoft while developing the Media Center theme. It was never made to the public for some unknown reasons. Royale Noir is nothing but a dark colored version of the original Royale theme.
Follow these steps to get the Royale Noir theme:
1. Get Royale Noir theme from
here.
2. Use your file compression manager to extract the contents of this file in a folder.
3. Rename the folder to Royale Noir.
4. Copy this folder and paste it in: "c:\windows\resources\themes\"
5. Run the �luna.msstyles� by double clicking on it.
6. Select "Royale Noir" in the color scheme drop down menu.
Now, you have Royale Noir installed in your computer.
Visit the link below for some screenshots.
Source:
Hidden Windows XP Theme | Shivaranjan.com