shell changing has always been an option on NT...... beyond logging in its your choice as such.but I'm not sure you can remove or uncouple windows explorer from the OS
It will not change file open dialogs and similar but they come from shell32...hmm not a full shell change really just the desktop and filebrowser.... assume a replacement for the latter is around.
Some did try to use the NT4 explorer but its a non starter unfortunately.
Again don't be running outlook express from yer alternative desktop...that would be naughty.
By the way 'view my desktop as a web page ' must have been the pinnacle of computer and security stupidity I suppose if you owned the internet it made more sense...ah megalomania and monopolies are fun to watch.
mike