MIX cookie crumbs and butter; press firmly onto bottom and up side of 9-inch pie plate.
STIR boiling water into gelatin in medium bowl at least 3 minutes until completely dissolved. Stir in lime zest and juice. Refrigerate 30 to 45 minutes or until slightly thickened.
ADD whipped topping; stir gently with wire whisk until well blended. Refrigerate 15 minutes or until mixture will mound. Spoon into crust. Refrigerate at least 2 hours or until firm.