scripting photoshop exr-IO

i was trying to write a script for photoshop that automates the merging of two #'d files from differant folders

and adding them as layers and saving them to a new folder. simple right, i have a few copies of scripts that 

do just that but they are for jpg's or psd's and don't work with .EXR multi layers from MAYA and VRAY.

at first it was problematic because you could not alter .exr but then EXR-io came out and I thought there 

was hope, because it allowed you to add a layer to .EXR. problem solved right? https://www.exr-io.com/

well not exactly because the plug-in makes you select options and press "enter" to open the first .EXR, and then 

again requires you to press 'enter' again upon saving the file. which makes record and playback automation 

difficult, and also stops my other scripts from working. 

as i am working with animations each folder ussually contains between 1,000 and 200,000 frames around

1-5gig each. 

it occured to me i could run a script with .psd and then convert to .EXR but i would end up with huge storage 

on my hard drive with multiple folders, and the possibility of degredation to the files would always happen.

so, the process is to render out 2 folders of multiple files from Maya via Vray, merge the layers on an .exr

in Photoshop, and then open them in the foundry's Nuke for compositing.

reference:

https://www.youtube.com/watch?v=t8HM-nl7Ens

https://forums.chaosgroup.com/forum/v-ray-for-maya-forums/v-ray-for-maya-wishlist/992234-vray-render-elements-maya-layers-exr-multi-layer

started, not finished, since i know well, nothing about c++