Hi, welcome to Yorkietalk, your little girl is so cute, I can see why you want another one just like her. I agree with Wylie's Mom the more you research this, the more you learn that breeding Yorkies is much more difficult than breeding the larger breeds. I personally wouldn't want to take the chance. Here's an excellent article on some of the pro and cons of breeding.
Breeding Your Dog and
Dog Owner's Guide: Ten reasons to breed your dog. There's just so much to learn in order to really do it right.