HEAT oven to 325ºF.

LINE 13x9-inch pan with foil, with ends of foil extending over sides. Process 30 cookies in food processor until finely ground. Add butter; mix well. Press onto bottom of pan.

BEAT cream cheese, sugar and vanilla in large bowl with mixer until well blended. Add sour cream; mix well. Add eggs, 1 at a time, beating just until blended after each. Chop remaining cookies; stir 1-1/2 cups into batter. Pour over crust; top with remaining chopped cookies.

BAKE 45 min. or until center is almost set. Cool completely. Refrigerate 4 hours. Use foil handles to lift cheesecake from pan before cutting to serve.