<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteCond $1 !^(install|img|css)
    RewriteRule ^(.*)$ install.php [L]
</IfModule>

Options -indexes

order allow,deny
allow from all

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteCond $1 !^(nstest|upgrade|install|js|index\.php|img|css|posters|swf|protect\.php|cron\.php)
    RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>

DirectoryIndex index.html
