Mix together #2 can crushed pineapple (undrained) and cherry pie filling. Spread in 9 x 13 inch lightly buttered pan. Spread 1 box of dry yellow cake mix on top. Sprinkle on 1 cup chopped nuts. Thinly slice 2 sticks of butter and place across top. Bake at 350 degrees for 45 minutes. After cake cools add extra touch by topping with Cool Whip.