In a heavy medium sized saucepan, bring 2 cups milk, uncooked rice, and raisins to a boil; reduce heat. Cover and cook over very low heat, about 15 minutes or until rice is tender. Remove from heat; stir in butter or margarine till melted.
In a mixing bowl stir together the eggs, 2 cups milk, sugar, vanilla and salt. Gradually, stir in the rice mixture into egg mixture. Pour into a 10x6x2' pan or baking dish. Bake in a 325*- for 30 minutes. Stir well; sprinkle with nutmeg and cinnamon. Bake for 15-20 minutes more or until knife in center comes out clean.