The modelling method is in the Genius Code course. If you watch the person in action you can model them on just about anything. If you want to apply their behaviours and actions you model them. The GC course guides you though looking at their posture, breathing and actions.
Modelling someone who is good at Photoreading using the process in the GC naturally works. Your actions follow your intentions so if you perceive that the person you're modeling does xyz when photoreading you can model that and make the self adjustments. Ultimately it's not the other persons beliefs about photoreading you need to adopt its your own that need to be modified hence the purpose of modelling.
Alex