Some words about the methods Scoreboards can be used:
Manual way:
-you manually copy the relevant files into data/ui folder. If you want to change them you simply replace the files before starting the match by switching out and back to the game. No complete restart of FIFA 16 is necessary.
Switchers:
there are some versions of Switcher programs in different patches (here an
example).
A subfolder is created where you have your different themes and/or scoreboards-overlays. You can choose any of them
before starting a match. Just select from the list and hit import/ok.
Scoreboards load without problems, menus may need a restart of FIFA 16.
CG File Server by Shawminator:
for detailed instructions check the
thread, here you will only have an overview.
This is my favorite method, because it makes the same as the above procedures, but once set up it goes automatically. No need of leaving FIFA 16. You can assign scoreboards, TV logos, Intro Movies to different tournaments (and stadiums!)
The disadvantage is that it "only" works in tournament and career mode, not in kick-off mode.
What happens exactly?
When the graphics are correctly assigned CGFS takes the ones from the subfolders described below and overwrites the ones in your data folder. (This means as well that the last graphics used with CGFS will be used in case you play without CGFS the next time)
By installing you get 5 new folders in your FIFA 16 directory:
FSW - these are by default the FIFA 16 generic graphics. These files are used in kick-off mode and for all tournaments without any assignment. If you are a fan of Europa League for example you can put the UEL Scoreboard here. This will be than used in kick-off mode. BUT as well for all tournaments without a scoreboard.
MoviesGBD - here you keep your intro movies (while match is loading) in VP8 format with a bumper file (this is the static screen after the video is finished). Each tournament has its own folder with two files in it: bootflowoutro.vp8 and bumper.big
TVLogosGBD - here you keep your TV Logos in big format. You create one folder for each tournament. You can put several logos in one folder and CGFS is switching among them randomly. I did it with several countries. Ex Greece where you have Cosmote Sports 1-6.
ScoreBoardGBD - this contains the files for your overlay sets. Again each tournament has its own subfolder. This subfolder is basically an alternative data/ui folder. So anything (like crests, fonts, minikits, tifos) that is driven by the "ui" folder can be altered with it as well, not just pop-ups and scoreboards. More detailed explanation here.
StadiumGBD - is for stadium assignment (team, tournament, tournament stage, etc) but this is not part of this topic.
Additional Programs by GhostFIFA:
TV Logo Changer: only changes TV Logos. Put your PNG Image in the appropriate folder and you can assign them one by one before the start of the match.
TV Scoreboard Changer: only changers Scoreboards. Put your overlay_9002.big in the appropriate folder and you can assign them one by one before the start of the match