Organising the patch files
The first step you need to do is to download all the patching programs and files. The patching process uses some batch files that require every file to be put in the correct location, so follow these steps:
Create a new folder somewhere called OFA_eng.
Within this folder OFA_eng, create 4 new folders:
original
original_dlc
patched
patched_dlc
Download the following and put them all into OFA_eng:
The latest version of imas.exe from https://github.com/faraplay/ImasArchiveS/releases (Make sure to download imas.exe, not Imas-Archive.exe)
make_npdata.exe v1.3.4 from https://github.com/faraplay/make_npdata/releases
The following files from this Google Drive folder:
patch_main.zip
patch_dlc.zip
patch_main_disc.bat
patch_main_psn.bat
patch_dlc.bat
Your folder OFA_eng should now look like the image below.
Make sure that all the filenames match exactly, otherwise the batch scripts will not run properly.
Next step
The next step is to patch the game files. The instructions for this will differ depending on which version of the game you have.
If you have the disc version go to this page.
If you have the PSN version go to this page.
If you don't know which version you have, see the guide on the previous page.