An off-line Windows update via CDROM.
Also handy if you have family members using Windows on a dialup.

http://www.heise-security.co.uk/articles/80682 

It uses Windows WSUS software to perform the updates.
You will need a Windows computer with about 3Gig of space to create the CD or DVD.
If you are only updating Windows XP English, a CD will suffice.

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Todd Young