The XNB Loader allows you to use several XNB mods without having to download and install them. It can also create new mods.

The first thing you need to do is download the latest version of SMAPI. The installation process is not very difficult, but it is a little complicated. The good thing is that you will get a detailed instruction and a guide.

After installing SMAPI, you need to unzip the download into the Stardew Valley/Mods/XNBLoader/ModContent folder.

The next step is to run the game. You need to start the game and choose the XNB mod you want to install.

The installation process is very easy, but you need to be a little bit careful.