I don't know where First Aid for Step II CS gets their info (since the CS content is supposed to be all "top secret" & we're not supposed to "reproduce" the content by any means, including memorization...) or how accurate it is, but there is a "cases" section at the back that lists "Instructions for the SP" (eg - "cough when doctor enters room and then every 3-4 minutes thereafter", "act nervous and give 1-word answers", etc.) Then it has like a checklist for the "SP" to fill out about all of the things you did (introduced self - 1 pt, made eye contact with pt - 1 pt, washed hands - 1pt, etc.) there are like 25-30 checkboxes by different elements of the history (to see whether you asked all that various stuff). There were only like 4-5 checkboxes for physical exam for any given case.
Again, I don't know if this is how the exam is REALLY scored, or not. But if it is, how you interact with the pt & taking a good history are way more important than your exam skills...