Thanks for all the advise. I ended up brining the chicken in a sugar, salt, water brine for about 2 hours. Then I cubed the chicken and put it into the frying pan and simmered it with some chicken taco seasoning mix (I had to add a few more spices to this), and water. I simmered it a little longer than I wanted trying to get the water to evaporate, but the chicken still turned out tender where otherwise it would have been tough. So I think it worked perfectly, the taco's were excellent. I served them with some spanish rice, onions, cilantro, cheese, lettuce, tomatoes, alvacado, and sour cream.