Attaining NTLM information from IE browsers.

I know this is in the archives, but I couldnt seem to find the answer I needed. I am running redhat8, apache 2.0.44, and php 4.2.2. I am trying to write a script that will emulate the IIS server and request NTLM auth. from the browser. And then decode the base64? information and compate the user information against a ldap function that connects to a active directory server. I know that you must modify the header with the header() command. I have done that, and the most I get in one line of information back from the browser. There is suppose to be three lines of encoded information sent back. If anyone has any code or knows the complete hand shake or anything really, I would really like the help. This is a really big project at my company, and they are considering moving to a linux platform and even PHP. But if I can't make the same stuff work that their w2k cold fusion platform does. It's not going to work so well.