Spoon 1 cup meat mixture into slow cooker; top with layers of half each of the noodles, broken to fit, and cheese mixture. Cover with 2 cups of the remaining meat sauce. Top with remaining noodles, broken to fit, cheese mixture and meat sauce. Cover with lid.
Cook on low 4-6 hrs or until liquid is absorbed. Sprinkle with remaining cheeses; let stand, covered, 10 min. or until melted.