The file is apparently no longer located at http://www.bartb.ie/xkpasswd although there are several links to it, including one in this article. Could you please post the file back to http://www.bartb.ie/xkpasswd or create a redirect there? I was able to download it from http://www.bartbusschots.ie/downloads/xkpasswd-v0.1.zip and thanks for that!