Dr Joe has made free detailed descriptions available, giving the steps of each of the meditations referenced in Becoming Supernatural at the following link:
Becoming Supernatural Meditation Information Page
This will give you all the information that you need as to how to participate in and perform each of the meditations referenced in the book.
Alternatively, if you would prefer the guided version of the meditations referenced in the book, you can find them for purchase at the following links:
Blessing Of the Energy Centers
Reconditioning the Body to a New Mind
Project Coherence
Each meditation includes a detailed introduction covering the science and additional information that you will need to participate in the meditation.