[I have my reasons]

My friend just inherited a new home. The lady that lived there before her had many animals living inside and she was to old to take care of them . So naturally they urinated all over everything. We have tried everything to get the smell out. Cleaned with bleach and other expensive pet odor cleaners and nothing has worked so far. It has only gotten a little better. Does anyone know how to get that awful smell out of her home. Its really sickening and I am afraid if her family moves into the home without getting that smell out of there they will get sick.
WE have taken up the carpet and flooring and cleaned the wood like crazy but its soaked in . What do we do?