[cinq]

Just off the top.

You will need to create a table for the comments, probably with 3 fields :
- cid ( comment_id ) set to auto_increment.
- cuser ( comment_by_which_user_id )
- aid ( article_id_in_which_comment_was_made_in )
- ctext ( comment_text )

With this created, before inserting rows ( ie. comments ), just check

if($bbuserinfo['userid'])

to only allow registered members on the boards to be able to post a comment.

And when they do post a comment, use the value of

$bbuserinfo['userid']

and insert it into the cuser field, and the text the person makes into ctext field.

There would probably be a hidden tag in the form to be submitted when making a comment with the article id.

That's how I would do it