[imp] Exposing only imp

[Juan Germano]

Hi. I have been trying to find a way to hide the whole Horde part from my  
IMP's users. I have set up imp so it's directly accesible through the  
document root following IMP Admin's FAQ, so I can login to imp by this url

http://www.webmail.mydomain.com/

and after login:
http://www.webmail.mydomain.com/mailbox.php?mailbox=INBOX

and have disabled the left menu frame too.
Now, when clicking in options I end up in IMP's options but it shows the  
'Modify options for' and the dropdown showing both IMP and Horde. I would  
like to know if it is posible to disable that dropdown through  
configuration or should I edit the pref's templates instead?

-- 
Juan