Crap, why did you have to link to Gnome-Look? I can spend hours on that site..
I currently use Shiki-Colors – Gnome Wise as my theme. It’s an older version though so I might upgrade it now. I can’t remember the name of my theme on winXP right now.
Well you have to hack or replace a dll-file, but once that is done then there’s a large number of themes out there. I think the file is themeui.dll but I’m not entirely sure right now.
Of course you could also just replace the shell (explorer.exe) with something else. I used bblean for a while which was nice. It is kind of like fluxbox.