Add sugar and yeast to luke warm water and let raise for 10 minutes. Meanwhile, add the shortening, molasses, and rolled oats to the boiling water. Add yeast mixture. Mix in flour, one cup at a time. Roll out on to a floured surface and knead for 8-10 minutes. Put dough in a greased bowl, cover, and let raise for 1 hour. Punch down raised dough and cut it into 4 equal portions. Place each piece in a greased bread pan. Cover and let it raise 3/4 -1 hour. Bake at 400 degrees for 30 minutes.