The installation of a theme that totally changes the operating system is something that Windows XP and 2003 have never supported natively, it's only possible to use the themes included by Microsoft that are relatively dull, but if you want to customize your copy of Windows, nothing better than using UXTheme Multi-Patcher.
Customize your Windows XP installation
By installing and following the instructions of this program you'll manage that your Windows installation allows you to select any design for your menus and screens, you'll only need to find a file with the .theme extension and simply apply it. Thus, you'll have a bright and colorful operating system, that has been completely redesigned.
The only thing that UXTheme Multi-Patcher does is activate some options and modify the files necessary for Windows to allow you to apply external themes, in such a way that you'll be able to download customizations based on football teams, models or anything that you can imagine.
So now you know, if you want to surprise everyone with a totally customized operating system, this is the software that will allow you to do so.