Combine crumbs and margarine; press into bottom and sides of 9 inch springform pan. Combine Neufchatel cheese, 1/2 cup sugar, and vanilla, mixing at medium speed on electric mixer until well blended. Add eggs, one at a time, mixing well after each addition. Reserve 1 cup Neufchatel Cheese mixture; add pumpkin, remaining sugar and spices to remaining Neufchatel cheese mixture. Mix well. Layer half of pumpkin mixture and half of Neufchatel cheese mixture over crust; repeat layers. Cut through batter with knife several times for marble effect. Bake at 350f 55 minutes. Loosen cake from rim of pan; cool before removing rim of pan. Chill. 10-12 servings. From package of Light Philadelphia Brand Neufchatel Cheese.