There are quite a few ways to deploy Windows XP Service Pack 2 (SP2). Check out what TechNet has to offer on the subject.
I point it out here because SP2 is worth deploying, but I know many corporations face different challenges when trying to deploy any new software to their desktops. The information at TechNet is a great starting point and I was pretty impressed with the quantity of information on the topic when I was recently researching it. I figured I should share my little find just in case you don't usually cruise the TechNet web site.