Limiting Search Areas
 

I'm looking at setting up PHPDig on our intranet at work. I understand I can limit which directories PHPDig will search. Is it possible to restrict subdirectories too?

i.e. can I have it search http://www.mydomain.com/directory/ but not have it search http://www.mydomain.com/directory/restricted/ ?

Would I use the robots.txt file or is there another means of accomplishing this?