[Mediawiki-l] External Authentication trouble

[Jim]

I'm trying to setup external authentication with MediaWiki.  I've gone over 
http://wiki.case.edu/CaseWiki:External_Authentication time and time again 
but it's not exactly clear. Do I need to do only pieces of it?  Everything? 
I'm just not following.  SO, I'm hoping someone can spell it out for me.

Let's say I have a PHP script (lets call it ourmethod.php) that puts up a 
web page and authenticates a user using our method.  Exactly how do I get 
MediaWiki to display ourmethod.php for the login and what exactly do I need 
to do to ourmethod.php to have it tell MediaWiki "this guys ok"?

Thanks!