MIX graham crumbs and butter; press onto bottom of 8-inch square pan. Refrigerate until ready to use.
MICROWAVE juice in microwaveable measuring cup on HIGH 1 min. Add to gelatin mix in small bowl; stir 2 min. until completely dissolved. Gradually add to half the cream cheese in medium bowl, beating with mixer after each addition until blended. Whisk in 1 cup COOL WHIP; spread over crust. Freeze while preparing next layer.
BEAT remaining cream cheese and milk in separate medium bowl until blended. Add dry pudding mix; beat 2 min. Stir in remaining COOL WHIP and zest; spread over gelatin layer. Refrigerate 3 hours.