LINE 8x4-inch loaf pan with foil, with ends of foil extending over sides. Cover bottom of pan with 8 cookies. Crumble remaining cookies.
BEAT cream cheese, sugar and vanilla in medium bowl with mixer until well blended. Stir in COOL WHIP. Spoon 1-1/2 cups cream cheese mixture into medium bowl; stir in melted chocolate.
SPREAD remaining cream cheese mixture over cookies in pan. Sprinkle with crumbled cookies; press gently into cream cheese mixture with back of spoon. Top with chocolate mixture. Freeze 3 hours or until firm.
REMOVE dessert from freezer 15 min. before serving; invert onto plate. Discard foil. Let dessert stand at room temperature to soften slightly before cutting to serve.