Crush 8 cookies into fine crumbs; mix with butter. Press onto bottom of foil-lined 9x5-inch loaf pan.
Beat next 4 ingredients in large bowl with mixer until blended.
Whisk in 3 cups COOL WHIP.
Spoon 1/2 cup cream cheese mixture into small bowl; stir in melted chocolate until blended.
Spread half the remaining cream cheese mixture onto crust; top with chocolate mixture. Cover with remaining cream cheese mixture.
Freeze 4 hours or until firm. Invert dessert onto plate.
Remove foil, then re-invert dessert onto platter so crumb layer is on bottom. Coarsely break remaining cookies. Top dessert with remaining COOL WHIP and broken cookies.