Thomas,

I think (not sure) under NT it can be also installed with WinNT SP6(a). Do you've that SP applied?
You can see shell32.DLL history and versions at http://support.microsoft.com/default.aspx?scid=http%3a%2f%2fsupport.microsoft.com%2fservicedesks%2ffileversion%2fdllinfo.asp&fp=1

>
>you've probably nailed it. Those keys are not in the registry and
>the active desktop was probably never installed there.
>Those machines are now fully patched IE6 -
>probably need to be uninstalled and reinstalled after IE4.
>At least I believe I still have IE4 with VS98 - sigh.
>
>Thanks for the quick answer