Foolproof?
Slipstream is a way to integrate sp into your existing xp cd. Meaning, changing your xp into sp2 so you don't have to run sp2 separately (new version of XP?).

Since you already install sp2 into your system, it useless to use your existing xp cd to try " install repair ", it even worsening your problem.

How to do it:
http://www.viperlair.com/articles/ho...eam/winxpsp1a/
Eventhough it's showing how to slipstream servicepack 1, it also work for sp2, you just need to change the sp name.

Good luck