This guide will walk you through setting up DIVA Mod Manager[gamebanana.com] as a non-Steam Game to download, update, and manage your mods. I will not be covering how to manually install DIVA Mod Loader[github.com] since that is covered in this other fantastic Steam Guide. (DIVA Mod Manager will setup DIVA Mod Loader for you anyways.)

This guide does not involve or showcase the Linux installation script for DivaModManager[github.com], it covers a different method very similar to setting up Unverum[github.com] on SteamOS.

Also just as heads up, most custom Song Packs require or at least encourage the use of Song Limit Patch. Upon first use, it will create brand new save data and wipe your old. You can't use your old save with mods but make a backup if you don't wanna lose it forever.

You will need Protontricks, if you already have that installed you can skip this entire section after reading this.

Open up Discover and search for Protontricks then install it.


After that, search for Flatseal then install and open it.


Click on Protontricks on the left, scroll down to Filesystem then click All user files and give permission to /run/media under Other files.

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What is Flatseal and what exactly am I giving access to?
Flatseal allows you to review and modify permissions from your Flatpak applications, we are giving Protontricks access to any external drive (like a MicroSD card) you may have in case the game is installed there.

Download DIVA Mod Manager from GameBanana[gamebanana.com] or Github[github.com]


Extract the folder x64 and DivaModManager.exe to wherever, shouldn't matter where.
(For reference, I placed mine at /home/deck/Documents/Diva Mod Manager)


Right Click DivaModManager.exe, then click Add to Steam.


Open up Steam and find DivaModManager.exe in your Steam Library. Click on the Gear Icon and then Properties.


In Properties, click on Compatibility, check the box, and set it to Proton 9.0-2 (or your preferred Proton).


(You can also rename it from here)

Now click Play and you should get an error telling you to install .NET Desktop Runtime[dotnet.microsoft.com]. Click Yes and it should open a download page.
(close Diva Mod Manager if it doesn't close itself after clicking Yes.)



Navigate to the file you just downloaded, Right Click on it then click Open with Protontricks Launcher


Scroll down to DIVA Mod Manager, click on it then click OK.


After a couple seconds, this window should pop up. Click Install.


Close the window once it's finished.

Navigate to DIVA Mod Manager in your Steam Library and click Play. Once it opens click on Setup towards the top and point it to DivaMegaMix.exe


After setup is completed, DIVA Mod Manager should have installed DIVA Mod Loader for you. You should be able to download mods without issue.


You'll know if everything went right if your games folder looks something like this
(You can also test by trying to download a mod)


Finally, in order for mods to actually show up in-game, navigate to Hatsune Miku: Project DIVA Mega Mix+ in your Steam Library. Click on the Gear Icon towards the right, then Click Properties.


In the Launch Settings, copy and paste
WINEDLLOVERRIDES='dinput8.dll=n,b' %command%


Boom done (hopefully)

Some Mods in this game are huge and require you to download them off Google Drive or some other site. Once you've downloaded your mod, open the zip/rar/etc file, then place the folder containing the mod in your Mods folder.


This happened to me when I forgot to extract the x64 folder alongside DivaModManager.exe.

You are probably launching through the Executable and not Steam. Open up DMM, towards the top right make sure Steam is selected.


Open Protontricks
Find & click DIVA Mod Manager in the list, then click OK
(It should be a Non-Steam Shortcut)


A Winetricks window will eventually pop up, click Select the default wineprefix, then OK


In the next window click Run winecfg, then OK


In the Wine configuration window, click the Drives tab, then check Show dot files

Click Apply then OK, and close any other Winetricks windows.

You can launch the game itself and play with mods just fine but anytime you download new mods or change around mod order, you need to launch the game through DIVA Mod Manager for those changes to take effect.
(also double check your Steam Launch Settings are correct)


There are so many reasons this could be happening, but for starters

• A lot of Mods in this game aren't compatible with each other, especially the Eden Project[gamebanana.com].
  
• If you are using multiple song packs, disable all but 1 and see if the game boots.
  
• Disable mods in a batch to see whats causing the problem.