make cake according to the box and bake in a 9 x 12 pan. When its done cool and leave in the pan.
After cake is cooled. Make frosting. In a large bowl combine vanilla pudding and 1 cup of milk, beat on until smooth and thick. Then add cream cheese and beat again until smooth. Fold in unthawed cool whip. Frost cake, top with cherries, pineapple, and walnuts.