Mod asset replacement not working

[wormwoman]

I'm currently working on my first ever mod, and i could use some help. it's a simple reskin i want to do, but i don't be seeming to get it to work.For context, i'm using the extented sample character file as a base, and so far, i've just replaced the icons with new graphics, but for whatever reason, it's not updating in game. Ive replaced the vanilla sample files, made sure that they don't exist in my folder anymore and updated and refreshed my DS mod tools, but it still shows the placeholder character's icons.

you can also see here that it looks like that there would still be pictures of the template character in saveslot_portraits or selectscreen_portraits, when i go to the file, there's no sign of them in here.