Preheat oven to 400 degrees F. Cream butter and sugar until light and fluffy. Blend in 1 egg. Add flour; mix well. Press dough on bottom and 2" high around sides of 9" spring-form pan. Bake for 5 minutes.
Reduce oven temperature to 350 degrees F. Combine softened Philadelphia Cream Cheese and sugar. Mix at MEDIUM speed of electric mixer until well blended. Blend in pumpkin, spices and salt; mix well. Add 2 eggs, one at a time, mixing well after each addition. Pour mixture into pastry-lined spring-form pan; smooth surface to edge of crust.