Anyway, Service Pack 2 of Windows XP is an 80 megabyte installation file. You may want to wait for getting it on CD-ROM or you better hope you have a broadband Internet connection.
I have a slip streamed SP1 XP CD, and I plan on doing the same with SP2 XP. =)
People commonly have 80 Gig hard drives these days. So the SP2 file is one one-thousandth of total storage space. Those with dialup can just start the download when they retire for the night.