Heat oil in a large skillet over medium heat. Add chicken and saute 5 minutes, until browned on all sides. Add roasted red peppers and liquid smoke and cook 1 minute to heat through. Arrange tortillas on a flat surface. Top each tortilla with an equal amount of chicken mixture, to within 1/4-inch of the edges. Top chicken mixture with cheese (1/3 cup of cheese per tortilla). Roll up tortillas and place on a baking sheet. Spray with cooking spray and bake 10 minutes, until cheese melts.