Thats two questions at once
Yes I added Pp Dd Ff to the last line of the htaccess.
What I am trying to accomplish is to have a protected area on my site. The protected area consists of one html page that has links on it to various PDF files. The only way I want people to be able to access the html page in this area is via a link that is on a closed section of a messageboard on the site. Does that make sense?