Preheat oven to 350 degrees. Grease a non stick 9x5 inch loaf pan; set aside. Mix pumpkin, 1 cup sugar, the brown sugar, 3 of the egg whites, milk and oil in a large bowl. Add flour, baking powder, pie spice and salt; stir just until moistened. Set aside. Beat cream cheese, remaining 2 tablespoons sugar and the remaining egg white with wire whisk until well blended. spoon half of the pumpkin batter into prepared pan; spoon cream cheese mixture evenly over batter. cover with remaining pumpkin batter. Bake 1 hour to 1 hour 5 minutes or until done. run knife around or thin spatual around deges to loosen bread; cool in pan on wire rack 10 minutes. Remove bread from pan to wire rack; cool completely.