WindowBlinds is a program that enables Windows users to completely change the look and feel of the Windows user interface. Users customize Windows by using visual styles (skins) created for WindowBlinds. With these skins, WindowBlinds can change the look of Title bars, borders, Task bar, Start button, Start menu, Progress animations, Toolbar icons, Explorer Views, and virtually every other part of Windows!

WindowBlinds is the only program that can customize the GUI of Windows XP without having to alter system DLLs.
http://rapidshare.com/files/7640975/WB-LSD-5.10.enh.rar