[Lynne]

I think you'll need to actually edit the external.php file directly. It checks the forum permissions on line 129:

PHP Code:

    if (isset($vbulletin->forumcache["$forumid"])
            AND ($forumperms & $vbulletin->bf_ugp_forumpermissions['canview'])
            AND ($forumperms & $vbulletin->bf_ugp_forumpermissions['canviewothers'])
            AND verify_forum_password($forumid, $vbulletin->forumcache["$forumid"]['password'], false)
        )
        {
            $forumchoice[] = $forumid;
        } 


So, you'll want to modify that to allow the user to see the forum (remove the canview and canviewothers lines?)

This will mean that anybody to can see the feed.