Dragon Ball FighterZ | How to make a mod costume compatible

First off, english is not my main language, so I apologize if something is hard to understand when I talk. I'll try to add captions later for those who think the audio is too jarring or they can't understand me properly.
Secondly: DO NOT UPLOAD ANYTHING YOU DO WITH THIS METHOD WITHOUT ASKING PERMISSION FROM THE ORIGINAL MOD CREATOR.

Decrypt key: b9uW0RKNY91be8HN3Lemi68j6Xsi2l7fQJYsp5oR4al4C4c9kY5E0l90411l9P3L

Links:
UE Viewer: https://www.gildor.org/en/projects/umodel#files
UnrealPak: https://cdn.discordapp.com/attachments/547825225371484166/853960958538678282/Unreal_Pak.rar
Asset Editor: https://github.com/kaiheilos/Utilities