Install OfcXP service pack when CD lost?

[Alan Braun]

I've lost my Office XP install CD. Most of the updates I've installed before
have required the CD at some point during the install process or they won't
install. Now WinXP's latest security update is nagging me to install
Office's SP3. It is a 50meg download that I don't want to do on my dial-up
line if I'm going to have the install crash for lack of the CD. Is there a
way to make the updates install when you don't have a CD to feed the machine
during the update process?

Thanks
Alan