Hacked every mention of "/comment.php?sid=unixtimestamp&pid=0&type=article"
into
/commentarticle/unixtimestamp/0/article/.

Then created a new folder called commentarticle and then created a .htaccess document in this new folder. the Mod_Rewrite rules in this doc are:

RewriteBase /commentarticle/
RewriteEngine on
RewriteRule ^(.*)/(.*)/(.*)/$ /comment.php?sid=$1&pid=$2&type=$3