I haven't been reading this forum for very long, but one thing I haven't really seen is anybody talking about turning off unneeded services in XP. Yes removing components helps, but there are still lot of services installed that run by default that don't need to be active and can be disabled.
Search for Black Viper and you will find a guide to turning off Windows Services. This will help as well.
There are multiple threads that cover these exact topics an a lot more. Like Brady said, spend some time in http://www.mp3car.com/vbulletin/oper...-optimization/ and it will guide you through a lot.
just do some searching on what can be kept and what can be thrown away.