FalconFlyr,
With regard to ignoring the GPWS warnings I was referring to aircraft that are designed to be flown on QNH, and where the GPWS datums are taken from the QNH (i.e. Altitude) this causes false GPWS warnings if the aircraft is flown with QFE set; if this happens every time you are flying a QNH designed aircraft in CIS airspace then the human factors element would naturally lead to assuming that GPWS warnings in CIS airspace are spurious.
The important point is that instead of arguing about it here, Chief Pilots/Training Departments should be addressing these issues and setting out operating procedures to be put into operations manuals. Line training/recurrent training should then ensure that crews are aware of the appropriate procedures.
As has been mentioned already, it is not difficult and it is even easier if it has been thought about beforehand.