rootz

Hi all, I would like to find out whether is there any way that I can load the windows updates files (downloaded via WUD) onto nLite (or anything else), and let the system self run to install all the updates. The reason why I need to do this is because I need to update a few laptops and they range from XP SP 2 to XP SP 3, and it would be very tedious to do so 1 by 1. Thus, appreciate all feedback / advise on how I can go about resolving my problem. Thanks and regards, Rootz