Orphan puppy Information:?

Last week my friend brought over a three week Pitbull/Rottweiler puppy. Her mother was young and abandoned them, so she took it home. They couldn't keep her themselves, so I took her in. She's a plump little thing and is healthy; walking around, even has started to howl. I've had her for almost a week now and this is the schedule she and I have set:

5:00am she wakes me up hungry. I just started introducing her to starter food, only a teaspoon at breakfast, lunch, and dinner. After she eats that I make four ounces of milk (she drinks goat milk, that is what they put her on and the vet told me not to change it because she was already use to it) she only drinks half of it and then we usually go back to bed until 7am or 8am and then she drinks the other half. Then goes to sleep.

At 12:30pm she wakes up and starts to cry to eat. Once again I feed her a teaspoon of started wet puppy food and the four ounces, but she only drinks two.

2:00pm she finished the other half.

6:00pm or 7:00pm she's hungry again and I give her the teaspoon of wet food and she drinks two ounces of milk. Then finally at 11pm or 12am she finishes the other half off.

This is what she has been doing since I've got her. She's doing really well, goes to the bathroom good, walks around, barks a little and is a little playful but loves to sleep. This monday she will be four weeks and I've been told to move her to three feedings. How would I fix the schedule up so it wouldn't leave her hungry or crying through the night? Also, at 6 weeks I read she should be off the milk and onto dry puppy food mixed with wet until about 9 weeks. Is this correct? So when she gets to 5 weeks, right before I ween her off the milk should I move it to two bottel feedings a day and more wet food?

Thanks everyone for your help. And please, don't go on about how it's dangerous to have her at this age, and how she should be with her mother--I know. But, as I stated, she was abandoned. I've taken care of a few litters of abandon kittens but not younger than four or five weeks and never a puppy at this age. Thanks for you help.