Any way to tweak the ammo selection on Nearinfinity?

I want to make a script that allows to change the ammo type (in the quiver) when facing different enemies. Lets say that you want the Ranger to automatically use Normal Arrows for normal enemies, whereas if he faces a Shadow to switch to an arrow type that affects magical beings (fire arrow, arrow +1 or +2)

Any way to do it on NI?

UPDATE: found an insightful post that partially deals with it or shows some code to do so:

https://forums.beamdog.com/discussion/comment/575426#Comment_575426