title: redirection of a addon domain (and all urls) using .htaccess
body: <p>Ok, I've done a bunch a reading, as well as playing around, but I cannot solve this .htaccess problem.</p>
  
  <p>I have an addon domain to my main hosting account.  I've managed to have the root addon domain go to a specific file using the following .htaccess code:</p>
  
  <pre><code>RewriteEngine On
  RewriteCond %{HTTP_HOST} ^(www.)?addondomain.org$
  RewriteRule ^(/)?$ /new-index.php [L]
  </code></pre>
  
  <p>That's all well and good; however, if someone tries to access the addon domain at any other URL than the root, and that page does not exist, then a 404 pops up. So, if I go to addondomain/car.php a 404 will display.  </p>
  
  <p>I would like all 404 errors for the addon domain - and ONLY for the addon domain - to also display the new-index.php file. </p>
  
  <p>The ErrorDocument 404 /new-index.php command isn't an option because then it impacts both the main domain, as well as the addon domain.</p>
  
  <p>Put differently: I want any URL for the addon domain to point to /new-index.php.</p>
  
  <p>Thoughts?  Thanks.</p>