Cook rice in pot or rice steamer with water. Place rice in pot, and add 1 cup (about 9 ounces) of tomato sauce. Add shredded cheese, 3 tbsp cumin and 3 tbsp chile powder. Stir well, and allow cheese to melt. Add more cheese, cumin and chile powder to taste.
Cut chicken into small chunks, 1-2 inches. Heat oil in frying pan, and cook chicken cubes until they are alomst done. Add 3 tbsp cumin and 3 tbsp chile powder. Increase heat, and let it fry until almost blackened (1-2 minutes).
Reduce heat, add 1 cup tomato sauce and shredded cheese to chicken. Stir well, and allow cheese to melt. Remove from heat, and combine rice mixture with chicken mixture. Stir well, and add more cheese, cumin, chile powder and tomato sauce to taste.
Heat both sides of 1 large tortilla over an open flame for 3 seconds each side. Scoop a good amount of the mixture and put it in the center of the tortilla. (not too much, or you will not be able to roll it). Add some cheese, sour cream, salsa, and hot sauce. Fold over the left side of the tortilla toward the middle (about 1/3 of the distance) and then roll from the bottom up.
Roll burritos fat, arrange them in a baking pan, then pour remaining tomato sauce over them. add some cheese, and bake on 350 for 15 minutes.