I'm a little slow in finding this, and it's certainly an example of my being easily-amused... But I just downloaded the Royale Windows theme, which was originally available standard on XP Media Center Edition. The download lets you use it on the other versions of XP, and I've installed it on my XP Tablet Edition machine.

Microsoft New Zealand has made it available to download, along with the New Zealand version of the Bliss desktop image (can you say "sheep?") and a cool road-sign desktop picture, too.

The pic at right is my desktop with the Royale theme and a few Konfabulator widgets - it makes for a nice background image. Click the pic for larger size.