STAND 16 wafers around edge of 8-inch square pan lined with plastic wrap. Add boiling water to jelly powder in medium bowl; stir 2 min. until completely dissolved. Add ice; stir until melted.
BEAT next 3 ingredients in large bowl with mixer until well blended. Gradually beat in jelly. Whisk in 2/3 of the Cool Whip until well blended. Refrigerate remaining Cool Whip for later use.
POUR half the jelly mixture into prepared pan; cover with 16 wafers. Microwave jam in small bowl on HIGH 15 sec. or until melted; brush onto wafers. Cover with layers of remaining jelly mixture and wafers.
REFRIGERATE 4 hours or until firm. Invert dessert onto plate; top with remaining Cool Whip and berries just before serving.