Waterdreamer,
the booklets are sold in the alumni forum site. You should contact IAHP by mail so they can send you a catalogue with prices.
About your question on how much and how long to walk and run, there´s a schedule in the book, BUT I never followd it. I did my own schedule, based on the program, because for me the physical part had to be more intense.
When my son was 6 months old we would do baby circuit, where he would creep 45 minutes to an hour straight, twice a day, in a race. He loved it for me to chase him so I pushed him hard to go fast and not stop.
At 6 months he stood up, and I made him walk holding onto furniture the whole day, I never passed him anything, e.g. ball, but I put it close to his reach.
At 2 yo we would walk Mon thru Fri 2 hours daily. If I could not achieve it, my minimum was 3 times a week.
We also started running at this age.
Now that he is 4 yo, running 1 hour non stop, and walking 18 holes nonstop in the golf course, carrying his own bag AND playing the course.
We don´t walk every day and we don´t run every day, because now we are focused to PHD and golfing exercises every day. So golfing (walking) is twice a week and running is once a week. Lately we have started hiking (something that I use to do) with him, on relatively easy hills and mountains, and that would be once every 10 days.
So, when you are doing a specific exercise (e.g. running) it has to be every day. When you are ready to move on to something new, that exercise you do it once a week or freely, without scheduling, and the new exercise you do every day.
At 4 yo your son should focus on developing laterality. Choose a place to run (I have to do it on the street or in a park). Test him on how much endurance he has, and set that as the minimum. (500 meters?) Make sure he runs that distance well, which means correct arm movement, leg movement, and breathing. Make him discover his own tempo, and respect his pace from beginning to end. Do it for a week. When you see he is about to achieve comfort in that distance, increase it. DO IT WITH HIM!
Walking is much easier for him, but he should too do it physically correct. At that age, I think he should be able to achieve walking 1 hour non stop in short time. Then 1,5 hrs to 2 hrs.
Brachiation is OK to hang. Make the goal 2 minutes and then move to 5 minutes. It´s hard! Also make him swing (like primates do) so he starts practicing the movement.
Don´t be afraid to push him, but you will need to explain carefully what is required of him. Be sensible to off days, sickness, tiredness and laziness. You will have to learn to differenciate. Also, let him choose things (abiding by the rules) e.g. where to run to, run or walk first, what clothes to wear, etc. This will start making him responsible for his own program. give him rewards for his achievements (not toys, candy, or buying something) but giving him more independence: cooking the family Sunday lunch, becoming responsible of the dishwasher, taking care 100% if his closet, whatever is really needed inside the house.
It will start turning into a way of living, rather than just a physical program.