Hello i have a quick question if someone can answer....which i dont think it will be a problem

with all the guru's on here
anyways i have this friend at work this is trying to install a HP deskjet 6122
but can not find any sort of printer config..in GNOME with Redhat 7.1 to setup the new driver if that maybe the case also with it hooked up its just printing garbage...which i think the cache may need to be cleared cause it might be printing up old stuff or may not have the right driver installed..how do i access the printer config in GNOME so that the problem can be further searched
any help to this would be greatful.