fo4edit Bulk edit head parts of 26 NPCs

[kirryus]

I'm trying to change the race of 26 NPCs to a custom race. I was able to do it with FO4Edit, changing RNAM and WNAM manually, which wasn't too much of an effort. But there are at least 10 head parts I'd have to replace and doing that for all 26 NPCs isn't gonna be fun. I tried TES5Edit Automation Scripts but it seems to work for anything other than head parts. 

 

So the question is, is there a way to bulk edit head parts for all the NPCs or is there a way around?

 

Thanks