If you're installing Windows XP SP3 on multiple machines, or you still haven't got around to downloading it at all - you'll be pleased to learn Microsoft has released SP3 as an ISO image you can burn to CD, and then install from disc.
The pack contains all the fixes, updates and security hotfixes released previously, and we have it available for download via our download section here. It's a hefty 540MB, but once you've got it on disc, you won't need to download again.
Given that Dell and others are making XP available via "downgrade" rights, this is just the thing to keep your network in top shape.
Go here to download the ISO.