Version 1.5 update to the popular Royal Vista theme which is specifically designed to blend into XP. While most vista themes simply don't look right in XP, this one fits in snugly.
Version 1.5.1 is just a small update, with a number of small bug fixes. Should be releasing v1.8 with some major changes in it soon.
V1.5.1 Fixes include:
Start button problem resolved
Gradient added to frame headers (bit at the top of windows)
Window caption buttons (minimise, restore, close etc) darkened
Deeper colour to the side of explorer windows
Glitch in the wireless network settings
Any recommendations as to improvements that could be made are very welcome.
for more info, screenshots and the official comment page.