This mod is not the cause of your CTD.

Game not loading, freeze and CTD

Most kind for the swift answer.

Not sure if by "Main unit key" you are talking about the unit's name or their unique indexes, either way you can check by yourself with RPFM (which you are going to need anyway in case you are planning to make a submod).
I'll take a wild guess and assume that you just need the unit's name:
zerg_nor_norscan_giant_spiders = Norscan Giant Spiders

Hi, could you please share the "Main Unit Key" for each units ?

Does exactly as advertised. These are some big spiders for Norsca.

It is with a heavy heart that I must inform you that I will not be updating any of my mods in time for the Chorfs update because my potato PC has finally left me after years of honoured service.
I have already found a replacement, but since I still need to know the shipment data and because of other shenanigans going on, I can't give you an exact ETA on when I'll be back.
You have my full permission to take and update any of my mods, but keep in my mind that I'll be back eventually and I'm going to update the OG ones.
Now I know that some of you might want to leave a comment to cheer me up or ask me some questions but please DO NOT do that and keep the comment section clean so that people can read this comment and understand why I'm not updating my stuff.
Thanks for all the support and see you again when my new rig arrives.

Eh, I like colourful spiders.
I could make a reskin but I wasn't really planning to add more stuff/work on this one post-release.

Any way to make them black/white/brown as their colors not pink green and orange? Doesn't make since for Norsca since its all dirt and snow.