Always make a backup of the files you edit.Every archive/mod you download should be extracted with a tool like 7zip, not the built-in extractor that Windows has because it 'blocks' files downloaded from the internet (in short: Microsoft's BS).You will need to know at least some basic principles of modding ( I highly suggest giving a good read at these and the various file formats used in this game).
This guide is made specifically for the PSN version of the game, but the same procedures can be adapted and applied to the disk/ISO version.
