Where do I go to find instructions for creating HD Texture Packs?

[nicefunfungirl]

I'm currently trying to create HD Textures for Corpse Party (The first game at least/More accurately replace the bust sprites and CG images), and I'm not sure how to go about it. What I have found so far, it's helped to see how to replace the textures, but it's a matter of getting them to work right now.

I think these were for the basic texture recolor maybe? But not necessarily HD Textures, as the texture warped positions and got all weird after it was replaced, and I have zero ideas how to work it from here on out..