header at top of index.php:

<?php 
define('IN_PHPBB', true);
$phpbb_root_path = './forums/';
include($phpbb_root_path . 'extension.inc');
include($phpbb_root_path . 'common.'.$phpEx);

//
// Start session management
//
$userdata = session_pagestart($user_ip, PAGE_INDEX);
init_userprefs($userdata);
//
// End session management
//
?>






later on down thepage:


<?php
if( $userdata['session_logged_in'] )
   { 
echo('
<div style="margin-left: 15; margin-right: 15; margin-top: 5; margin-bottom: 15; ">
<form action="forums/login.php" method="post">
<table border="0" cell-padding="5" align="right">
<tr><td>username</td>
<td><input type="text" name="username" size="12" ></td>
</tr><tr><td>password</td>
<td><input type="password" name="password" size="12" ></td>
</tr>
<tr><td align="right" colspan="2">
<input type="submit" value="login" name="login">
</td></tr>
</table>
</form>
</div>
');
}
else {
		echo('Logged in');


}

?>





structure:

webroot/index.php - main non-forum related page
webroot/forums/index.php forum based