If you're so mad-crazy over Windows XP that you can't bear to be away from it then perhaps the Nokia XP theme offers the solution.
True, it won't add any of the functionality of Microsoft's famous operating system to your phone, but it will make it look a bit like you're using a PC.
I say "a bit", because in reality it's only the Bliss wallpaper and the blue and green menu bars that give it that Nokia XP that Windows look. Unfortunately, the system icons in your Series 60 device won't be altered to look like Windows shortcut keys.
That said, Nokia XP is still as striking theme for fans of the Windows OS.