Drain peach slices, reserving 1/4 cup of liquid. Place peach slices and reserved liquid in 10-inch round glass cake dish. Sprinkle with 2 tablespoons dry pudding mix. Microwave margarine in 1-quart bowl at high for 30 seconds, or until softened. Stir in remaining ingredients, including remaining pudding mix, until crumbly. Spoon onto peach mixture. Cover with a paper towel and microwave on high for 10 to 12 minutes, rotating dish once. Let stand, covered, 5 minutes before serving.