artwork credit https://twitter.com/NDTwoFives/media?s=09
Before we rush to install gazillion of addons, one thing we must understood is the folder structure of an addon. An addon must starts or consist of at least one of these folder : "gamedata", or "db".
Don't get Intimidated, MO2 is SIMPLE
Don't get intimidated by MO2's interface. It REALLY is just a LIST of folders, except with checkboxes and you can order them around to tell the game, which one to load first, and which one to load later. That's all that to it, you DON'T need to understand what magic MO2 is doing at the background linking your addons with the game.
What you need is just a bit of logical thinking - "hei I have two addons that conflicting, which one should I load first, which one should I load later?"
To prove that it is really THAT simple, let's try to install an addon with just plain old folder copy-pasta, like you probably did in JSGME...
Locate the "Base Directory" you added in MO2 setting in previous installation process. You will see something like above, the "mods" folder is where all your addons are stored.
Create a folder within this "mods" directory, name it whatever you want, this will be your addon name.
Within your new addon folder, is where the contents of your addon goes, typically there should be a "gamedata" folder to start with. You can put all sort of crap in here, but the only things that matter to the game are "gamedata", "db", "appdata" & "bin" folder.
Once you done creating you glorious new addon, go back to MO2, right click anywhere and select "refresh", or just hit the F5 key - now you will see your addon listed on MO2 interface ready to be enabled.
IT'S THAT SIMPLE.
This isn't really how you will normally install addon, but I want to walk through this example to show you that it is nothing more than just folders and files - which you CAN manipulate manually, whenever you need to, for example if I want to update an addon, I can simply come in here, copy paste replace the files with new ones.
Installing addon - the quick way
If the addon is packaged correctly with "gamedata" or "db" folder, MO2 will recognize it automatically. Simply hit the "Install a new mod from an archive" button (2nd from the left) and browse to your zip file. MO2 will suggest a name, correct it if needed to, and you're done installing an addon.
You will notice a checkbox beside the addon name, that's where you disable / enable an addon.
Double clicking on an addon will bring you to the information panel, you can access the info panel through right clicking as well. The right click context menu also consists of many useful functions, including assigning your addon with categories. The "Open in Explorer" option will open the addon folder in Windows Explorer, handy whenever you want to make changes to the addon files such as updating it.
Installing Addon - when MO2 didn't recognize the folder structure
Sometime when you installing addon through the zip file, MO2 will prompt to tell you that it is unable to recognize the folder structure. This may happens if the addon author placed the gamedata or db inside additional subfolders.
If this is your first time seeing the prompt, you will see a tutorial message explaining the situation. Click the little green arrow to proceed.
In this case, MO2 is unable to recognize the folder structure provided by Michiko's Sound Revamp 3.0. The first thing we want to do is uncheck all checkboxes, telling MO2 those aren't the stuff we wanted.
Next, locate where the actual "gamedata" or "db" we wanted and drag it to the top. Check it's checkbox to tell MO2 that is the folder we wanted to install. If you do it correctly, the red error text will gone. Simply click OK and now the addon is installed.
What is "Overwrite"?
After you launch your game once, you will start to notice there is a red "Overwrite" at the bottom of your mod/addon list. Don't freak out, there's nothing wrong with your game or addon setup.
"Overwrite" is simply another addon folder where MO2 stores anything that is created / generated while the game is running. This includes configuration files when you changes graphic setting, shader cache files created by the game, as well as screenshots you took. If you ever wonder where on earth are the screenshots you took in game, but found nothing in the original Anomaly game folder... well, here it is.
Do we need to do anything special with this "Overwrite" folder? Technically no. Just leave it be.