DirectoryIndex index.php index.html index.shtml
ErrorDocument 404 /index.php
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ index.php?rewrite=1&request=$1 [QSA]
RewriteRule ^$ index.php?rewrite=1 [QSA]

Options -Indexes