In a small bowl, mix cracker crumbs and sugar; stir in margarine. Press onto the bottom and up the sides of an ungreased 9-in. pie plate. Bake at 375° for 6-8 minutes or until lightly browned. Cool completely on a wire rack., For filling, in a small bowl, mix cream cheese and confectioners' sugar until blended. Fold in whipped topping. Carefully spread over crust; refrigerate until set. , For topping, in a small saucepan, combine gelatin and pudding mix; stir in water. Bring just to a boil over medium-low heat, stirring constantly; remove from the heat. Cool 5 minutes., Arrange peach slices over filling. Spoon gelatin mixture over peaches. Refrigerate for 4 hours or until chilled.