Drizzle 2 tablespoons rum over drained peach halves.
Cover and chill for several hours.
When ready to serve, prepare topping mix according to package directions.
Stir in 1 tablespoon rum.
Spoon some topping into 8 sherbet glasses.
Top with peach half, rounded side down.
Spoon additional topping in each peach cavity and sprinkle with slivered toasted almonds.