WK
You have repeated your theory many times so please explain why the Rad Alts were also not set in accordance with the SOP's; something that would have been essential if they were operating in accordance with your scenario.
In addition, perhaps you would explain why they had changed the Supertans waypoint to Corran thus removing reference to the HLP which would have been in the locality of the portable homing device.
Given that under your scenario they had never operated the equipment before, why did they carry out their first ever approach utilising said equipment flying directly towards high ground in poor visibility at a speed approaching 3 miles per minute?
Finally, who were the passengers who were on the flight deck for this demonstration?