Not sure about that, Kaz. SP3 is a consolidation of all patches and updates since SP2, plus some new ones, as I understand it. I also understand, but could be wrong, that Windows Update, if left to it's own devices, will only download the components it needs, so if the patch / update / hotfix is already installed, it won't apply it again with SP3. I'm not sure how the CD would work, whether it would overwrite the existing hotfixes or just install what's required. So, in answer to your question, I'm sorry, I don't know, but hopefully someone else will.