Cook spaghetti, drain, and mix in butter. Place spaghetti in a buttered 9X13 pan. Chop up sausage and brown in a skillet. Drain fat, and then mix in chunky spaghetti sauce. Take ½ C of the Parmesan cheese and sprinkle on top of noodles, followed by the 24 oz of cottage cheese, then another ¼ C of Parmesan cheese. Then layer the spaghetti sauce on top of that, followed by the shredded mozzarella cheese and the last ¼ C of Parmesan cheese. Cover with foil and bake at 400 degrees F for 30 minutes, then remove foil and bake an additional 15 minutes. Let cool for 10+ minutes before serving.