vBulletin Moderator permission inheritence

I have some code for the moderators control panel, and i cant seem to get any inheritence working. I really need it to happen :|

PHP Code:

function getaccess () {
    global $DB_site,$bbuserinfo,$forumaccess;
    if($bbuserinfo[usergroupid]==6) { 
        $accessquery=$DB_site->query("SELECT forum.forumid,forum.title FROM forum ORDER BY forum.parentid,forum.parentlist");
        while($access=$DB_site->fetch_array($accessquery)) {
            $forumaccess[]=array(forumid=>"$access[forumid]",title=>"$access[title]",modid=>"$access[moderatorid]");
        }
    }
    else {
        $accessquery=$DB_site->query("SELECT moderator.*,forum.title FROM moderator LEFT JOIN forum ON forum.forumid=moderator.forumid WHERE moderator.userid=$bbuserinfo[userid]");
        if (!$accessquery) {
            echo "No access detected. If you have access please email the administrator."; exit;
        }
        while($access=$DB_site->fetch_array($accessquery)) {
            $forumaccess[]=array(forumid=>"$access[forumid]",title=>"$access[title]",modid=>"$access[moderatorid]");
        }
    }
} 


Thats the function i use to get the forums a moderator has access to. How would i adapt this to also allow inheritence?

I use a

PHP Code:

 foreach($forumaccess as $key=>$forum) 


sort of thing to access the array. Would it be easier to work out the inheritence in the foreach or in the getaccess function?

[merk]

OMG asif the double click to copy to clipboard isnt the most awsomest thing ive seen for ages