You are correct in that the linearization droplet is a script that strips out all the irrelevant data from the output file from the photospectrometer, graphs the density increase, and gives you a string that you paste into the linearization="...." in the qdif file
The install script then takes that input data and creates a curve (on a mac you can acually see in the terminal window the lienarization curve that is created 0,0, 5,2.14 10,7.15 ...,... etc.
I have used those to rough in a acv curve in the grey_curve=" " area when the linearization is really off and then reprint a second stepwedge with the curve, no learization, and then fine tune with the rough curve and final linearization.
It is much easier to just get the grey_val overlaps set right and the linearization should just be one step process.
Richard Boutwell