-Find a rom hack or custom level you want to download in the official coop server (https://discord.gg/q95pkSHUuM) -Download it and save it in your "mods" folder in your sm64ex-coop repo -Extract the .zip file -Inside your new folder should be another folder -Take this folder and move it to the "mods" folder (whether it be cut and paste or click and drag it to "mods") -Inside that folder you moved should be more folders and .lua files, if it is then you can now run the game -Go to host, mods, then find your mod and click it -You may know host the room with your level or rom hack :)