Create an Unattended XP SP2 CD
 

" I'm sure you've seen the newer Microsoft XP Home and Professional boxed editions with service pack 2 already integrated into the install. Some of you must be thinking that it would be nice to have one of those newer copies, even though you can install your version of XP and updating it to SP2 for free. The problem is time. If you had one of those CDs, it would all done for you. Break out that old Windows XP CD and prepare to turn it into a slipstreamed SP2 and we'll also make it unattended. Time is money after all. "

Link: http://www.aselabs.com/articles.php?id=149