I wonder if they were familiar with that exact aircraft? My carrier flys a fleet that is not as standardized as we'd like, and it can sometimes be confusing when you jump from one to the next. A steam gauge MD80 has an entirely different system for switching the HSI from VHF to RNAV than does an EFIS MD80. Truthfully, that is not a great example, because the two aircraft are so different, but it does illustrate how two aircraft that appear to be identical on the outside can be day and night different on the inside.
Someone mentioned that it "pays to tune and indent", I tend to agree, but I won't blame this accident on a breakdown in that area until I learn more about the nav management system installed on the accident aircraft. It could be entirely possible that the aircraft could have flown the approach by reference to a full functioned FMS that didn't require anything to be set other than proper programming.
We all screw up at one time or the other. So far, the good Lord has kept my foul ups from killing anyone.
enigma