Mix graham cracker crumbs and melted margarine together and pat in bottom of greased 13x9 pan. Combine confectionary sugar, eggs, vanilla and softened margarine. Beat until puddinglike and spread over crumbs. Slice bananas over mixture. Spoon drained pineapple over this. Top with dream whip or cool whip. Sprinkle with crushed walnuts and dot with cherries. Cool well andserve.