Help with Swizzled images

[annoyedlurker]

I've been trying to do some basic mods recently, mostly replacing 2d pictures/sprites in games with lewder ones, but I've been running into swizzled images on my latest attempt. I've found some tools and basic instructions, but most of those tools seem to be for Switch/Play Station (I'm trying to work on a Steam/PC game, Action Taimanin) and also seem to assume I know a lot more about what I'm doing than I actually do. My search hasn't turned up anything workable yet, but I know at least one more experienced modder on this site was managing to get access to these images, so it's probably possible? Any help would be appreciated.