Now you have the xpsp2 installed, you go to microsoft update and discover there are close to 100 updates. This should help wiff that update.
http://www.microsoft.com/downloads/thankyou.aspx?familyId=25b9e53b-1402-4a08-8410-d855466d6205&displayLang=en
http://www.microsoft.com/downloads/thankyou.aspx?familyId=25b9e53b-1402-4a08-8410-d855466d6205&displayLang=en