1.Download the binaries from the releases section
2.Add the following dlloverrides to your wineprefix via winecfg & environment variable :
winmmWINEDLLOVERRIDES=winmm=n,b(Should be set to native,builtin)
3.Run taskmgr inside the wineprefix (it doesn't actually have to be inside the same prefix)
(Just do umu-run FrostyModManager.exe if you're having issues with regular wine)
4.Select the .exe for the fmm gw1 linux build
5.Load & apply the mods you want
6.Add the GAME_DATA_DIR and the path to your modpack (for most people its just C:\Program Files\EA Games\Plants vs Zombies Garden Warfare\ModData\Default)
(You need to get the path for that folder using a wine/windows explorer)
7.Launch the game and everything should work.