Running XP Well ?

Is there by chance an article or collection of set-ups and fixes to maximize XP like the ME article entitled "how to run Me well?"
My wifes system is slower than mine so I am adding 256Meg of RAM as she only has 128 but her machene is a HP511n WITH a 40 gig Hd (only 32 showing?) and it runs like an old lady.
Any help or idea's appreciated
KennJ

Check out Black Viper's site for tweaking XP's services. Somewhat tedious but well worth the effort to shut down the unnecessary ones.