1. Place 1 cup of the chopped pecans into each of the unbaked pie crusts and press into bottom of crust. 2. Bake pie crusts according to package directions and let cool. 3. Prepare Dream Whip according to package directions and blend in powdered sugar and softened cream cheese. 4. Fold mixture into cooled pie crust and top with blueberry filling. 5. Let chill before serving.