I found out what caused the error, the converter was automatically renaming the cpeg and gpeg, it changed the "cm" to "cf" in their names, undoing this fixes it. That being said, the results in-game are still the same, even if the converter doesn't show any errors anymore, even after renaming the textures and re-exporting the mesh in blender.
I don't understand why it's not working, but here's what my folders look like anyway:
Edit: I've also tried to name the cpeg/gpeg "cf_blabla" instead of "cm_blabla" and only change it later when it's time to package the "str2_pc"/"asm" file (or else it gives me the same error) but that also didn't help, the game still crashes even though the converter doesn't show any errors. Perhaps I should use the cloning tool to clone an item first, instead of trying to edit the Miss Mischief suit itself.
