This is what I try to acomplish:
/community/index.php?503 will push programatically a response to browser as
XenForo supports 401, 403, 404 and 503 error messages. My goal is to obtain a page displaying the related error message when I type into browser the http://xenforo.com/community/index.php?503 link for example. 404 is easy, it does it by default.
Thank you for your help, let me know what should I start with.