Add boiling water to gelatin mix in small bowl; stir 2 min. until completely dissolved. Beat cream cheese in large bowl with mixer until creamy. Gradually beat in lemonade concentrate, then gelatin until blended.
Add COOL WHIP and berries; stir gently until blended.
Pour into crusts.
Refrigerate 1 pie 4 hours or until firm. Freeze remaining pie up to 1 week before thawing to serve.