If you can switch to Ubuntu but you like the Ubuntu style, here is a Total transformation pack for Windows XP. This pack contains the visual styles for Ubuntu, Cursors, Boot Screen, LogonUI, Screensaver, custom sounds and much more utilities for Ubuntu feel on your Windows XP.
Take here are some screenshots for Ubuntu Customization Pack.
You need to download the installer using the following links. Ubuntu Customization Pack (Part1, Part2 and Part 3)
To download and install at your own risk.
