I already found them during my attempt last night but it didn't result in anything on the portrait. It looks like some more info/data or however the portrait system was done needs to add some new things into the CHS_Data.rvdata2 file to maybe get it to work, but thats the part I am stuck on. This is my first time touching anything RPG maker aswell so I'm not the most knowledgeable about how the editor itself functions or how to read these specific files in the editor unless it needs some extra plugins or anything to be able to edit and configure custom systems that cannot be edited with plane text documents.Skimming through the code, after decompression the calls will come from separate files (you can do this RPG Maker). For sprites, Charset sprite resources are handled in CHSCConfig and for portraits and poses, those are in PConfig. Scripts (from what I saw), don't need to be touched since they all use same defs in these two folders. I might have missed something, so trial & error is your best bet GL
Anyways I think I am going to stop trying to figure some things out with this specific game because I just found out about the situation a couple days ago, and it most likely means means I'm not going to possibly get any help from EccmA417 on this forum.
Well, thank you EccmA417 for doing some great work with the game and for getting me interested in finally having a look into how RPG maker games do their thing.