Ah, okay I fully understand the math and formulas now.
So in order to figure out the settings for the P0068 and P0069 tables, I would have to compare the OEM sensor default voltage settings to their equivalent bar pressure values as if the OEM sensor was still in use in the system, and then match those bar pressure results to the new Omni sensor voltages at those same pressures. That will work for both the P0068 and P0069 settings in a naturally aspirated application, but in a 12 psig boosted application, I will still have to figure out the new P0068 value. The P0069 value can most likely stay where I determine it needs to be for the new sensor as it will never see boost.
I did also notice that P0069 isn't even given as a DTC on/off option in my set of ProECU DTC maps as well, so this setting probably won't even be a concern.
I guess I have two choices on what to do concerning the P0068 setting for a 12 psig boosted application:
a) Experiment with the voltage/pressure setpoint to find where it can safely be set to, so that it does not trip the check engine light, which will be slightly above the voltage equivalent of 185 kPa for the Omni sensor (about 3.5 volts),
or
b) Simply un-tick that specific fault code from the DTC map in the software, as @
steve99 originally suggested.
It all makes sense to me now.
So where can I find an output voltage versus absolute pressure table for the OEM sensor? I suppose using geometry, I can make one.