In small saucepan heat milk to a simmer; stirring constantly, add custard mix and cook until dissolved, at least 1 minute.
Allow to cool for 3 to 5 minutes.
In bowl combine rice, raisins, and vanilla; stir into cooled custard.
Into each of two 6-ounce custard cups or dessert dishes spoon half of mixture; garnish each portion with dash cinnamon or nutmeg.
Cover and refrigerate until set.