So, really two things : One--- i have plaster walls from the 20s that crumble if you look at them too hard, and i can't figure out how to get a few 10-or-so-pound pictures on them. Two--- I have a HUGE painting on canvas, about 6 feet by 6 feet. I am TRYING to figure out HOW to put it on a wall, not frame it, but not let it look junky and like i taped the thing to the wall.......... ANY IDEAS? Thnks!