I'm following your instructions to try and install satsuki's various upscale textures, but I'm not seeing any changes in-game. I converted the .iro files to .png files, then I extracted the "battle", "fields", "magic", and "world" folders (the ones with the .png files in them) to FINAL FANTASY VII -> The_Reunion -> Custom -> satsuki -> Texture directory. I then went into the Options.ini and changed Mod_ID = NONE to Mod_ID = satsuki. I felt like I did everything right, but clearly I must have done something wrong. Am I missing something?
It's a bid fiddly, complicated by all the metadata and directories for Seventh Heaven. Completely ignore directories with names starting with Upper Case, those are metadata for Seventh Heaven. Worry only about the files and subdirectories within those directories.
As memory serves,
Battle
the contents of battle\ [lower-case b] go into YourModName\Texture\battle
Magics
the files in the root, rain7_00.png, seffect* go into YourModName\Texture\battle
the files in magic\ go into YourModName\Texture\magic
the directories in magic\ff7\data\battle go into YourModName\Texture\magic
You should have a directory tree that looks like
YourModName\Texture\magic\magic\
YourModName\Texture\magic\limit\
... etc
Fields
the contents of char\ and field\ go into their respective directories within YourModName\Texture\
World
the contents of world\ go into YourModName\Texture\world
Movies
All these files go into YourModName\Direct\movies