For those who don't know about "Royale", it was basically the first theme/visual style made by Microsoft after the release of Windows XP.
It originally came out for just Windows XP Media Center Edition 2005. It was always XP-compatible, but had a MCE-only installer file. Royale has been on the net for some time, but only after some people had extracted the files from the MCE installer and made the files available to all.
Microsoft New Zealand officially released Royale to users of all versions of XP.
They no longer have the download available, but you can still get it from my XP Themes page.
Since this is an official Microsoft-made visual style, you do NOT need any theme installers or patches to use this. Just download and install!
