No problem, Deb. I'm not what I would have even typed into search to find that link (I wouldn't have found it, or thought it was related to your question, had I not written it! ).
Not at the moment (though I'll think on it a bit). Do you have the ability to add modules to Apache on your dedicated server? If so, you could add the module and try using it.
(bad "knee jerk idea" deleted - doh! )
Actually, now that I am thinking about it, I believe the user password in phpBB is stored MD5 hashed, so if you do install the module and continue this approach, make sure you account for that with Auth_MySQL_Encryption_Types and Auth_MySQL_Encrypted_Passwords ON.
In other words, I don't have a clue how to do this - though after googling a bit it looks like it could be accomplished.
Just a heads up if you intend o doing any PHP manipulation of Apache authentication - you will need to be running mod_php also, not PHP-CGI, for that that to work. I'd love to here back what you figure out.
(edited after a little googling)