Well I am not an artist either. I just take what is there and manipulate the pixels.
I use combinations of donor boobs, liquify, and cut and paste.
With Adobe PhotoShop you have to be extremely careful using the liquify tool though as the finished breasts will look terrible.
I started out using Paint Shop Pro 6 and it took me forever to work on one picture.
I think I have progressed a bit since I started morphing 4 years ago though.