Hey Foggy,
You said: "...and never in a two pilot crew". Thats a good point where to start. Obviously you are experienced pilot, but never had a change to fly with in crew. It is a different world, I went through that point few years a go and it wasn't easy in the beginning. I hope that your check ride is more kind of evaluation flight than a check ride to pass some level. Crew coordination is not a automation, it needs work and that workhorse is company's training. Co-pilot briefing... Hhmmm, maybe best brief is: Crab your check list and start sequence from first line. Whole idea is a to give a challenge and have a response. No hurry, take your time and give that time.
Thats my comment, good luck
Hostile