I've just added a scanner parameter that will show you the torque value that the PCM is using to determine the location you are in the Torque Inverse table (Y axis).
This parameter is ID 12529. It is called Engine Indicated TQ Reference
This should help simplify this tedious task.
So far it is only in the TC-1791 definitions, but will be in the Copperhead and other PCM definitions very soon.