Believe me, I did look everywhere, opening a thread was my last choice. There are no instructions mentioning specifically what files should be hashed. I found instructions about unpacking the game's files with some applications - Unmass, Garden and PuPu but all of them either did not work or did not provide me with the original textures for the character models (which I assume are the ones to be hashed). Using Deling I could view and extract many files of the game, but there is no character texture folder within the unpacked archives. I've found everything, even the model files, except the textures they use.
I believe that the original textures to be replaced by tonberry via hashing are contained in the model files (MCH), but I don't know how I would separate the texture from the model, so that I could hash it. Hashing the entire model file does not work.
This is simply lack of a very specific knowledge that I need in order to get the hashing done, once I know how to obtain the correct files for hashing, the rest is simple. Shunsq, you developed berrymapper, so wouldn't you know where to get the files that go to the INPUT folder to be hashed and replaced?