Tweak UI is a power tool created (but not supported by) Microsoft. It will allow you to tweak many hidden (or at least hard to get to) settings of your computer. It gives you access to system settings that are not exposed in the Windows XP default user interface, including mouse settings, Explorer settings, taskbar settings, and more.
Version 2.10 requires Windows XP Service Pack 1 or Windows Server 2003.
Download the Windows XP and Server 2003 version here: http://download.microsoft.com/download/f/c/a/fca6767b-9ed9-45a6-b352-839afb2a2679/TweakUiPowertoySetup.exe
Download the Windows 9x, 2000, and ME version here: https://blog.ryantadams.com/wp-content/uploads/tweakui.exe