Yes, I was going to mention that tool to update certificates. I use it and it's very good. I will go into some detail here about it. It was developed by heinoganda, who is a sharp, knowledgeable contributor there for WinXP.
He's got many things going on with WinXP as well as Dibya and others. Anyone interested in WinXP for the future should stay in touch with that forum ... for XP, Windows 2000