Someone

<?php 

require($_SERVER["DOCUMENT_ROOT"].'/Smarty/Smarty.class.php');

$smarty = new Smarty();
$smarty->template_dir = $_SERVER["DOCUMENT_ROOT"].'/myapp/smarty/templates';
$smarty->compile_dir = $_SERVER["DOCUMENT_ROOT"].'/myapp/smarty/templates_c';
$smarty->cache_dir = $_SERVER["DOCUMENT_ROOT"].'/myapp/smarty/cache';
$smarty->config_dir = $_SERVER["DOCUMENT_ROOT"].'/myapp/smarty/config';

?>