Cees,
This is another book in which the author is describing flying a mission as a command pilot.
What is interesting here is that he is flying in the right hand seat with a lead pathfinder crew (apparently equipped with H2X), not a lead crew from his own group. From the description he is clearly doing some of the copilot duties. Also interesting is that he is not totally impressed with the skill level of the pathfinder crew.
https://books.google.com/books?id=0u...lot%22&f=false
Here is another book which discusses the command pilot. Again some interesting details. It mentions the co-pilot moving to the tail gunner position.
https://books.google.com/books?id=Po...lot%22&f=false
I suspect that command pilot duties (and even where he sat in the plane) may have varied by groups (maybe even squadrons, but that seems less likely). I do think the most common option was in the co-pilot seat and doing many of the co-pilot duties.