Larian Studios Forums Divine Divinity (English) General Need help unpacking .spr files to edit Death Knight (recolor & custom friendly follower NPC)

Hi everyone! I'm working on a custom edit/mod for Divine Divinity (Steam version).
My goal is to create a unique, friendly companion/NPC based on the Death Knight that will follow the player (FollowPlayer logic). I want him to be a separate NPC so regular enemy Death Knights remain unchanged.
Visually, I want to edit his sprite: recolor the red armor tones to full black/dark grey and change the eye glow to green. Is recoloring the entire armor texture on these 2D sprites a complex task, or fairly straightforward once extracted?
I've already tried unpacking the game archives and extracting the sprite files on my own, but I'm completely stuck. I really need some help here!
Could anyone point me toward the right tools to unpack/repack Divine Divinity's graphic archives (.pak / .spr) and edit sprite files? Any guidance on script editing for custom followers or where the Death Knight assets are located would be greatly appreciated. Thanks!