how to customize tag <title>

[Cornolio]

i have some custom pages, and i'd like to customize the tag title (i think i'll use <if condition...) to have just "Pagetitle", and not "Forumname - pagetitle".

the code used is

<?php

// GO TO FORUM DIR
chdir('./');

// STANDARD VBULLETIN STUFF
define('NO_REGISTER_GLOBALS', 1);
define('THIS_SCRIPT', 'pay-per-impression');
require_once('./global.php');

// GENERIC_SHELL VARS
$pagetitle = "Pay per impression";
$HTML = ""; // PIECED TOGETHER IN SCRIPT

eval('$navbar = "' . fetch_template('navbar') . '";'); 
eval('$HTML = "' . fetch_template('pay-per-impression') . '";');

eval('print_output("' . fetch_template('GENERIC_SHELL') . '");');

?>

the page create is: http://www.discutere.it/pay-per-impression.php

what to modify to have title:"Pay per impression"?

tnx