1 packages (3 oz ) lime gelatin
1 cups boiling water
1 pints lime sherbet, softened
4  ounces whipped topping

In a large bowl, dissolve gelatin in boiling water.  Stir in sherbet until well blended.  Cool until syrupy.  Spoon whipped topping into a large mixing bowl.  Gradually beat in the gelatin mixture on low  speed until well blended.  Pour into a 6-cup mold coated with nonstick cooking spray.  Refrigerate for 6 hours or until set.