In a bowl, combine flour, pecans and salt; cut in the shortening until crumbly. Gradually add water, tossing with a fork until a ball forms. Divide dough in half. Roll out each portion to fit a 9 in. pie plate; place pastry in pie plates. Flute edges and set aside.
Combine pie mix, milk and egg; pour into pastry shells. For topping, combine brown sugar, flour, pecans and cinnamon in a small bowl; cut in butter until crumbly. Sprinkle over filling. Cover edges of pastry loosely with foil.
Bake at 375 degrees F for 40 - 45 min. or until a knife inserted near the center comes out clean. Cool on a wire rack for 2 hours. Refrigerate until serving.