Using food processor or coarse blade of food grinder, grind cranberries.
In bowl stir together cranberries and sugar; set aside, In saucepan soften gelatin in 1 cup of the cranberry juice cocktail.
Cook and stir over low heat till gelatin is dissolved.
Stir in remaining 1 cup cranberry juice cocktail; chill till partially set (consistency of unbeaten egg whites).
Fold cranberry mixture and chopped oranges into partially set gelatin mixture; pour into a 4 1/2-cup mold.
Chill several hours or till firm.
Unmold to serve.