I was using this (domain changed to suit) to redirect entries to the forum. It goes straight there without the main index page loading:
Quote
RewriteEngine On
# Rewrite /index.php to /ubbt/ubbthreads.php for clubadventist.com only
RewriteCond %{HTTP_HOST} ^(www\.)?clubadventist\.com
RewriteRule ^index\.php$ /ubbt/ubbthreads.php [L]