customizing Reply-To

Hi, Could anyone suggest what'd be the easiest way to modify the Reply-To: -field so that it'd contain both (1) either the original sender _or_ original Reply-To: and (2) the list address? This is for special lists where most people sending aren't on the list (small teams handling, e.g., webmaster addresses and the like: replies should go also to others in the team so they know it's been taken care of). Can it be done simply by modifying rc.custom "reply_to" setting (and if so, how) or do I need to modify some of the scripts? Any suggestions would be welcome. -- Tapani Tarvainen