Suggest before tweaking read: http://mywebpages.co...CD/XPMyths.html
Many "tweaks" out there do not provide substantial improvement for ordinary users. Much more important to limit unnecessary background processes, keep the system cleaned and malware free. Knowledgeable people like the authors of the sites posted above, and others like Marc Liron and Mark Russinovich, and the MSVP advisors and consultants to this and other forums all have been using XP for years. If it can be done, they've done it. If it were good for us to do they would suggest it. After "tweaking" myself into trouble more than once or twice I now limit myself to making those changes that help me perform my desired tasks more efficiently. IMHO if a "tweak" requires me to make manual changes to my Registry it's not worth it. All I have to do is read some of the posts in this and other forums about BSOD and "Can't Reinstall" to keep me sober. Say what you will about Microsoft, but XP is not a Ferrari with a governor that can be removed to gain amazing performance. XP is what it was designed to be- a full featured automatic Oldsmobile with large trunk, reliable drive train, and custom entertainment package suitable for both home and business use.