Here's a possibility, after landing.
Park Brake apply.
Help Captain from left seat if not already done so in flight.
F/O climb into left seat.
Adjust rudder pedals and seat position to F/O's liking.
TAXY THE FRIGGIN AIRCRAFT.
Jeez couldn't he find an applicable page in the QRH for the situation.
Peuce.
No it aint sacred mate. After declaring a Pan he was within his rights to make that decision.