Place cookies in food processor bowl with metal blade or blender container; process 20 to 30 seconds or until crumbs are very fine. Reserve 2 teaspoons crumbs for garnish. To remaining crumbs in food processor bowl, add corn flake crumbs, sugar and margarine. With machine running, add water, processing until blended. Press mixture firmly in bottom and up sides of ungreased 9-inch pie pan. Set aside.