<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . ./index.php [L]
</IfModule>

ErrorDocument 403 /403.php
ErrorDocument 404 /404.php
ErrorDocument 410 /410.php
ErrorDocument 500 /500.php
<Files 403.shtml>
order allow,deny
allow from all
</Files>