Waldo
I haven't downloaded any of the Bus manuals I just assumed they were there because the DDIS selection is available, the same as the Boeing. Maybe someone with a Phd in ITcrapspeak could enlighten us further.
I do share your pain though as this has to be one of the (probably) cheapest and most user unfriendly systems I've ever encountered, bear in mind also that this is the starting point for the future... Lord help us!
Good luck, I hope you still have your sanity after spending all your G days trying to solve this one.
SR