Originally Posted by adultseo

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^/*.*$ http://www.yourdomain.com/404.php?file=%{REQUEST_FILENAME}$1 \
[T=application/x-httpd-php,L]

it enables you to create dynamic 404 pages

Best Regards,
Adult SEO