root@newsystems:~# cat /var/www/.htaccess 
Options +FollowSymLinks
RewriteEngine On
RewriteCond %{REQUEST_URI} !php

RewriteRule ^about$ index.php?action=about [L]
RewriteRule ^tools$ index.php?action=tools [L]
RewriteRule ^register$ index.php?action=register [L]
RewriteRule ^myuploads$ index.php?action=myuploads [L]
RewriteRule ^thread$ thread.php [L]
RewriteRule ^feedback$ feedback.php [L]

RewriteRule ^thread/([0-9]+)/?$ thread.php?id=$1 [NC]
RewriteRule ^thread/([0-9]+)/([0-9]+)/?$ thread.php?id=$1&num=$2 [NC]