[NTLDR]

Try removing the following if block from signature.php:

PHP Code:

// check the request is from a valid referer, if not send a 404 header
if (TIMENOW > $_REQUEST['sig'] || ($_REQUEST['sig'] > (TIMENOW + 30)) || $_REQUEST['req'] !== md5($_SERVER['HTTP_REFERER'])) {
    header('HTTP/1.1 404 Not Found');
    exit;
} 


Thats the part that checks if the image is allowed to be shown or not. Note that this will enable hotlinking etc unless you add other measures to protect against it.