Umm, no, that's not the only help you can get. Why you ask?
NT Authentication uses the users registered on the windows server to authenticate the users that log in on the forum.
I'm not a pro at NT Authentication myself, just played with it on my computer. Have not played with it in a live setting.
But to use it, you would need to disable anonymous users on your server. This is a server setting that your admin would need to make. Because you are going to authenticate each user that visit your forum, anonymous users won't be able to visit the site. So hence you have to turn it off.
Last I checked, this option is found in the Directory Security tab in your Properties of your website, in IIS.
Thanks Davio, The term server was a litle vauge. I did not know what server was being refered to. I finaly determined it was the IIS server that was being refered to and it is now working.