just rename your files into php files, like so:
PHP Code:
<?php
// ####################### SET PHP ENVIRONMENT ###########################
error_reporting(E_ALL & ~E_NOTICE);
// #################### DEFINE IMPORTANT CONSTANTS #######################
define('THIS_SCRIPT', 'file_name_here');
define('NO_REGISTER_GLOBALS', 1);
// ################### PRE-CACHE TEMPLATES AND DATA ######################
// get special phrase groups
$phrasegroups = array();
// get special data templates from the datastore
$specialtemplates = array();
// pre-cache templates used by all actions
$globaltemplates = array();
// pre-cache templates used by specific actions
$actiontemplates = array();
// ######################### REQUIRE BACK-END ############################
// assuming your forums folder is in a seperate direcotry than the area you have made.
chdir('./forum/');
require_once('./global.php');
chdir('./');
echo<<<EOF
your HTML can now go here ~_^
EOF;
?>
i don't trust my "EOF" thing in the echo, but maybe someone can fix it if it's wrong