HEAT oven to 350ºF.
MIX crumbs, sugar and butter until blended; press onto bottom and up side of 9-inch pie plate. Bake 10 min.; cool.
BEAT cream cheese and peanut butter in large bowl with mixer until creamy. Gradually beat in milk. Add dry pudding mixes; beat 1 min. Gently stir in 1-1/2 cups COOL WHIP.
SLICE banana; place in crust. Cover with filling. Refrigerate 2 hours or until firm. Garnish with remaining COOL WHIP and nuts just before serving.