2.5 Bar MAP scaling for SD Ceddymod?

[H@xtGSX]

In the traditional spirit of being a DSM cheapskate, I was thinking I could use the 2.5 Bar sensor I have from when I boost referenced my SAFC instead of shelling out the $70 for the GM MAP sensor... especially since the actual transducer in the GM sensor is just the 3 Bar version of the same sensor I have. I don't plan on boosting over 20 psi right now, so this 2.5 Bar sensor would have the highest resolution of any MAP I could use. It should top out at about 21.5 psi... but there's a bit of a problem.

There's no premade scaling for a 2.5 Bar sensor in the SD Ceddymods. I am not sure how the formulas are made or what the variables in them are related to, but if I am not mistaken, can't I just adjust the calibration table to compensate for the smaller MAP? Or is there a way that I could calculate the formula change I'd need to make in the code and insert it?

I am looking at the code for the 3, 4, & 5 bar sensor scalings, and the formula changes seem to be fairly linear with most of the sensors, but I assume that some of them must have a difference in how they output their signal because of the additional formula numbers... those look like corrective numbers to me. I just don't know much about the coding, so I am guessing. I hope one of you guys knows the answer...