The boys at Viperlair shows the world how to integrate OfficeXP SP1 into the
Office XP CD. IT's pretty cool, you should check out what they do here.
The whole point of this exercise was to create a CD with Office XP with
Service Pack 1. Should there be a Service Pack 2 (likely), this guide should
apply to it as well, though I'll be sure to double check. I know some may be
thinking that this is a lot of work, but think of it in the long run. You'll
now have a backup of your original CD, since I hear a lot of dubious stories
like "I lost my originals!!", as well as a backup of your CD key.