HEAT oven to 350°F.
MIX cookie crumbs and butter; press onto bottom of 13x9-inch pan; bake 10 min.
MEANWHILE, beat cream cheese and sugar with mixer until well blended. Add pumpkin and spices; mix well. Add eggs, 1 at a time, beating on low speed after each just until blended. Pour over baked crust; bake 30 min. or until centre is almost set. Cool 1 hour.
BEAT pudding mixes and milk in medium bowl with whisk 2 min. Stir in 1 cup Cool Whip. Spread over dessert; cover with remaining Cool Whip.
REFRIGERATE 3 hours or until firm. Sprinkle with nuts just before serving.