I was browsing the PHPBuilder.com discussion forums and noticed a reference
to userserver a NT services that has a php include file that will allow you 
to develop PHP applications that uses NT security to control access to various
functions...

I down loaded it and configured it...
BTW: I had a hard time finding it, so you can download
it from  here ...
Wrote some code and came up with this login system....

< ?php
require_once('rptvariables.php');
require_once('users.php');

// GetUserList();
if($submit) {
 $checkpw = CheckPassword($user, $password);
 $group1 = "Domain Admins";
 $group2 = "SITE_DEVELOPMENT_USRS";
 $checkgrp1 =  IsUserInGroup2($user, $group1);
 $checkgrp2 =  IsUserInGroup2($user, $group2);
 $erealname = GetFullName($user);
 if(!$checkpw == 0) {
     if((!$checkgrp1 == 0) || (!$checkgrp2 == 0)) {
   session_register("LOGGEDIN");
   session_register("realname");
   $LOGGEDIN = "$user";
   $realname = "$erealname";
   header ("Location: $rptpage");
   exit;
     } else {
       print "YOU'RE NOT a memeber of the Required Group to access resources";
       print "< br> You MUST BE a member of " . $group;
       exit;
     }
   } else {
   print "BAD USERID and/or PASSWORD";
   exit;
   }
} else {
print< << LOGINFORM
< center> 
< P> 
< FONT COLOR=red SIZE=+2> 
You have connected to a Private Networked Web Application.< br> 
From: < font color=blue>  $_connectedfrom  < /font> 
Date: < font color=blue>     $today < /font> 
< BR> 
AUTHORIZED Users are ONLY ALLOWED access.< br> 
IF YOU ARE NOT AUTHORIZED TO LOGIN< br> 
Please Disconnect ...
< /FONT> 
< P> 

< FORM ACTION=$PHP_SELF METHOD=post> 
< table> 
< tr> < td> USERID: < /td> < td>  < INPUT TYPE=text NAME=user> <
/td> < /tr> 
< tr> < td> PASSWD: < /td> < td>  < INPUT TYPE=password
NAME=password> < /td> < /tr> 
< tr> < td colspan=2> < INPUT TYPE=submit NAME=submit VALUE=LOGIN> < /td>
< /tr> 
< /table> 
< /FORM> 
< /center> 
LOGINFORM;
}


?> 

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