Xpize is a utility program for Windows XP (32-bit only) and Windows Server 2003 (32-bit only) that replaces most of the bits in Windows that didn’t match XP’s style with bits that do.
The software contains no spyware or adware, it is a purely volunteer-driven community effort; it is also easily uninstallable.
xpize does not replace any files, system or otherwise. Instead it “patches” the files by replacing the old resources inside the files.