Here's version 2.1.4 of the Windows XP Optimization Guide.
Clean Spyware and Viruses + Optimize Windows XP to improve home, work and gaming performance safely. Windows XP's default configuration is far from optimized. This Free guide will help you improve your overall system performance without having to manually edit the Registry. I avoid using or recommending "all-in-one" Windows XP Tweak programs since many blindly adjust settings that have no affect on performance and can cause future problems. This guide is designed to be performed top to bottom, in sequence since some steps are required to be performed before others. Before using this guide make sure your system meets the Windows XP System Requirements.