Hi, Welcome to Yorkie Talk. I love Yorkies too, and would love a whole house full of them.
For starters there is a lot if breeding information in the Yorkie Talk Library, and here are 2 links:
http://www.yorkietalk.com/forums/bre...-answered.html http://www.yorkietalk.com/forums/bre...t-breeder.html
Breeding is a pretty involved process if done right, and it is quite costly. You might just find that it is easier and more economical to expand your family by just purchasing pups from a reputable breeder and avoiding all the risks and potential to lose your beloved Parti gal. I personally could never risk losing one of my girls just to produce more pups, but if you do, then find a good mentor and be prepared for some expenses.
I wish you well, and in the meantime I hope to hear more about your girl and see photos. I'm sure she will bring you much joy.