Stir boiling water into gelatin in large bowl 2 minutes or until completely dissolved. Mix cold water and ice to make 1 1/4 cups. Add to gelatin, stirring until slightly thickened. Remove any remaining ice. Stir in whipped topping with wire whisk until smooth; mix in fruit. Refrigerate 10-15 minutes or until mixture is very thick and will mound. Spoon into crust. Refrigerate 4 hours or until firm. Garnish with additional whipped topping if desired. Store leftover pie in refrigerator.