Its a basic Windows XP theme.. from
ThemeXP.. Windows XP by default wont let you use these themes.. *I think* they want you to have XP Plus! installed to run them, though I've never tried..
There are two other ways to do it however... First and boring way IMO, is..
Style XP ($20 shareware, expires in 30days).
The other option is via a patch that modifies a WindowsXP system file that controls themes, called uxtheme.dll. You simply run the 200k setup file, reboot, and themes should work flawlessly, no need for a third party program wasting resources.
I used the UXTHEME.dll patch on two computers and it works perfectly..
uxtheme.dll patch
After you run it, follow the instructions in the little dialogue box before clicking any buttons.. (XP will try to tell you something has be replaced and it needs to fix itself, ignore it.. its safe).