WordPress MU

Hi guys. I have a problem.
Link exchange system provide the following php code:
<?php
define('_SAPE_USER', 'da60bdf712e521c9ba89437968090d20');
require_once($_SERVER['DOCUMENT_ROOT'].'/'._SAPE_USER.'/sape.php');
$sape = new SAPE_client;
echo $sape->return_links();
?>

so, the file http://somehost/da60bdf712e521c9ba89437968090d20/sape.php must be included. if i try to go by this url wordpress provide to create a blog... what to do to stop wordpress blog creating only with this name?

Use a mod rewrite expression to exclude that file, before it sends everything to index.php in your htaccess file.

There's an example floating around here for excluding "forum" or something like that that you could adapt to your needs.