XP Home w/SP3

I just had SP3 installed via Windows Update.
It went just fine. Installed without errors.

But I use XPize and decided it would be a good
idea to uninstall it before I rebooted. All I could do was
sit and watch as it replaced many of the brand new
SP3 DLLs with the old SP2 DLLS from XPize's backup
cache. Ugh. If I had rebooted without uninstalling XPize,
it probably would have replaced them anyway.

The reboot went fine. There appears to be no problems.
Everything works fine. Does this mean those DLLs were not
replaced ? Or they were but things still work with the old DLLs
and I'm not getting the benefits of the newer ones ?

How do I repair (if possible) the SP3 update
so I can get back those new SP3 DLLs ?

I know they are still in the Windows directory
somewhere but I don't know where and anyway
I don't have a list of the ones XPize replaced.

Thanks for any help.