Preheat oven to 400°F. Spray a rectangular baking pan with vegetable oil cooking spray. Arrange the chicken pieces in the pan and spray them lightly. Bake uncovered for 30 minutes. Turn the chicken pieces and bake for a additional 15 or 20 minutes, or until tender. Drain off the pan juices.
Mix the pineapple with the peach preserves. Pour over the drained chicken and bake for another 15 to 20 minutes, or until hot and bubbly.
Serves 4.