I 've decided to create a new user restricted to special use. I created this 
user with kuser.

Works well, I can log to it but...  there is no "Desktop" folder, 
rather /home/<new user> *is* the desktop folder.

With the result that any /home/<folder> shows on the desktop.  I guess there 
must be a way and a place to tell TDE to use /home/desktop but I have not 
found it yet.

Thierry