ASP and database help needed

Hi,

I have a big question. I will explain it in steps -

1) Users login to members section using a member id connected to MS Access database. A session variable is set for 30 minutes for all member section pages

2) In member section page there is a page with link, which when clicked will lead our members to a library page at different server. We don't have any control on that server.

So this is what we want to do:

Once members click the link to library page, only certain priveliged members can see the library page, so we want to password protect the link. Once they click the link, we want ask for userid once again and for password and then redirect them to library page.

My question is how to incorporate password into the members table, since only certain priveliged members can view the page. What happens to session variable which is already set, can i connect to database again, if so how to do it. There are about 4000 members how to generate password for all of them, and then how will the library server know that the person is coming legally from our server

I know the questions are really confusing, but i am sure there are many genius out there who must have done this before, any help would be appreciated,

thank you,
tamilgirl