Quote - [...] what is the problem that is solved by this script?

The script makes an INJ-REM pair of pz2 files from the current morphed state of the selected figure. All morphs that are expressed in the figure are consolidated into one morph per actor. A delta injection pose is written that will inject the morph into a PBMCC channel, you can choose which one. You can also choose precision filtering for the morph.

It only does one job, makes an INJ-REM, but it does it extremely well, giving me all the options I need with the minimum fuss and user intervention.