ADD boiling water to gelatin mixes in large bowl; stir 2 min. until completely dissolved.
MICROWAVE 6 oz. chocolate and evaporated milk in microwaveable bowl on HIGH 3 min. or until chocolate is completely melted and mixture is well blended, stirring after 1-1/2 min. Add to gelatin; beat with mixer until blended.
POUR into 8-cup mold sprayed with cooking spray. Refrigerate 4 hours or until firm. Meanwhile, melt remaining chocolate as directed on package. Dip cherries in chocolate; place on waxed paper-covered baking sheet. Refrigerate until ready to use.
UNMOLD dessert onto plate. Serve topped with COOL WHIP and cherries.