Thaw bread loaves and flatten to fit a long cookie sheet. Spread butter on dough. Layer ham, mozzarella cheese, salami and provolone cheese; each layer length and width of bread. Sprinkle oregano between each layer. Fold sides together lengthwise and seal seam in middle with more butter. Turn over and spread top with butter also. Bake with seam side down at 350? for 20-30 minutes until bread is brown and cheese is melted.