script to use existing map and put it under another map

Hi guys

I am hopeless at code - i was wondering if someone could help out.

I use coronarender, and i often use existing BUMP maps and then put it in a CORONROUNDEDGES map so that i dont need to chamfer it with a modifier or manually. Corona handles the rounded edges if you get my drift.

I want to automate this as i do it a lot - so for this example if i have in the BUMP map an existing map, i want to run the scrupt so that it puts the existing map into the coronaroundedges additional bump map - is there a way to do this in script? Happy to pay anyone who could help me out please?