I was told to set a script in php or perl that looks if in the directory where the called poage were an 404.php or 404.html file, if so include that, otherwise go up a level and try again, if one reach the home of the domain and does not find any 404 then use the default one ...
if you coded the script please send it to me .
What I've done is this, and it seems to work for me:
Alias /errors/ /usr/share/apache/errors/ ErrorDocument 400 /errors/error.php ErrorDocument 401 /errors/error.php ErrorDocument 403 /errors/error.php ErrorDocument 404 /errors/error.php ErrorDocument 408 /errors/error.php ErrorDocument 500 /errors/error.php
It's a PHP script that reads the error code and displays a generically formatted error message for all sites on my server.
