[lifted from the ecco_pro forum,  thelms82000 contributes:]
 
 
 
++:+-::ITT~~='text'
 
 
put this in the auto assign rules in the "Text" folder.
 
 
 
If you were to remove the word "text" from the item, it's "Text"
folder value would be removed.  
 
(You can tweak this behavior in many ways.)