Preheat oven to 350 degrees. Spray an 8-cavity mini loaf pan with cooking spray.
In a large mixing bowl combine eggs, sugar, oil, pumpkin, flour, baking powder, pumpkin pie spice, and salt. Mix well. Stir in the walnuts and raisins. Divide the mixture evenly among the mini loaves. Bake for 25 minutes or until set. Let cool.
Combine the cream cheese, butter, vanilla, and powdered sugar in a medium saucepan. Heat over low heat until pourable, whisking to make sure it is smooth.
Remove the loaves from the pan and set on a cooling rack over a piece of waxed paper. Drizzle the glaze over and let sit for 10-15 minutes or until the glaze is set.