preheat oven to 350. melt your butter, mix with pecans and flour,(you can either add more pecans-less flour or vice versa, play with it) pat into a 9X13 baking pan and bake for 30 minutes. let cool
mix softened cream cheese with half cool whip and 1 cup powdered sugar. spread over crust. next mix your puddings with milk and pour over cream cheese mix and allow to set up. then top with remaining cool whip.