it makes no difference which CD you use if they are both the same version.
Now if one is XP pro with SB2 and the other XP pro original, I would always
use the one with SB2.
However, you want to use the proper product key. Each CD came with a product
key. They will be different. If you do not know the product key you
activated then download Belarc advisor on the activted computer and it will
tell you the product key on that computer.
http://www.belarc.com/free_download.html
--
Jon Hildrum
DTS MVP
(e-mail address removed)
www.hildrum.com