[mADmAX`]

Is this what you are getting at?

My site is hosted on its own domain (blah.com), as well as my forums on another (blahforums.com). When you try to access the directory where my files are at /files (blah.com/files) it asks you for a a login and password. It does this check to the forums then proceeds. If not, you get no file. I also have a private members section where it does the same but also checks to see if they have a flag that I have issued them. Without this flag, no private file. This is done with .htaccess and the sql database of the forums.