Over Low Heat, Melt Peanut Butter Chips, 1 Cup Of Condensed Milk, And 2 Tablespoons Butter. Stir Ocassionally And When Completely Melted Remove From Heat. Stir In Peanuts. Pour Into A Waxed Paper Lined 8 Inch Square Pan. In A Sauce Pan, Melt Chocolate Chips With Remaining Condensed Milk, And Butter. Add Salt And Stir To Mix Well. When Completely Melted, Pour Over Peanut Butter Mix Already In 8" Sq. Pan. Chill At Least Two Hours Or Until Firm. Turn Out Onto Cutting Board And Cut Into Squares. Makes 2 Pounds Of Candy Or About 36 Pieces.