Hi thank you very much for the response..
yes.. I've now re-read that. it says
"Album guest user: This username/password is set in the edit tab for the album in question. Viewers must login to view this album or its subalbums."
I think the problem i'm having is finding the "edit tab for the album in question" ... I can see where the username/password is set for individual albums - I must be blind, or missing something BIG here - other things
I mean, right now - I have a username and password set so that users must log in to view anything, and the whole gallery is protected. - but I really want/need to be able to set a different password for each of several different albums in the gallery