Mr. Joe,
As David states in a post down the aisle, you really don't need to pose
the same question over and over and over, in every thread.
You need to do a Google search for Password Protection or something
similar. There are several snippets you can cut and paste to an html
code fragment and then add to your page. A good place to start is
http://www.dynamicdrive.com/ AFAIK, though, most of the scripts there do
not assign a different password for each user, but a general password.
If your ISP offers CPanel, it has an option to password protect a
folder. (Plesk probably does also.) The downside is you will have to
assign a different password for each user - which could take up a
significant amount of time.
I believe CoffeeCup offers a program that does what you are looking for,
but it is not free. Probably about $35 or so.
Mike