ok i know how to and i hav done twice already but since i upgraded to .4 this weekend any new moderators, altho their status is set to moderator they cant edit/delete posts etc- like thy are still a normal user... dont think its a problem with the mods but ive got a couple installed and i could well be wrong so these r the ones i hav:
Private Messages mod Birthdays mod Referrer mod Site Integration mod
You have to make the member a moderator (edit their profile), then add them as a moderator to a forum/forums. Only then can they edit & delete other posts.