It could possibly be done; although soundtracks are loaded into the memory from the start and only get "refreshed" (loaded again) after going to gameplay and back to the menus again, meaning that before the "specific" soundtrack is played for a specific competition (for example), you first have...
Editing .nav files are indeed the first thing, these files are the menu flows, they decide what will be visible on the screen when you go into a (sub)menu. They tell the game which screen/file to load and by seeing .nav files from the 2014 FIFA World Cup game for example (where there are...
There are BL*S versions and NP*B versions. BL*S versions are Blu-ray rips (Disc version) and NP*B versions are PSN/PKG versions, which need the files to be encrypted.
Normally, it should work and it does not matter what language version you have. If it crashes, it looks most likely to me that...
FIFA 14 hair files work without issue in FIFA 12
FIFA 14 head files cause some weird deformations (but game does not crash).
FIFA 14 head files with a few blocks (I can't remember from the top of my head which blocks, I will look soon) from FIFA 12 heads - The head looks perfect, but there are...
http://www.mediafire.com/file/vyp56mih34j2tpt/body.rar/file
In this I have only moved 1 arms/jersey/legs/shorts/socks type from the FIFA PS3/Switch version, if this works fine/has no graphical glitches I will move all the other body files via Blender.
You might need to rename the body files...
The issue is that it will mean all FIFA 14 kittextures need to be replaced (because Switch/PS3 kit textures are different due to the new model, not to mention there is a slight decrease in quality of the sleeves due to the new uv map) or all FIFA 14 heads need to be moved in Blender to accompany...
I also have female body files from 2014 FIFA World Cup game (3D fans).
This game also has some more extra's, like clothes (both male/female) and other stuff like headgears (as acessoiries). Since this game is basically FIFA 14, it should work without to reposition stuff.
I already tried to...
I am sorry if people are waiting. Again, there is little to no free time anymore for me to work on FIFA 19 on PS3.
However, I have started working again, I will do my best to have a good patch soon.