• First copy your Gameboy ROMs to your player. They need to have the extension .gb or .gbc. And no, we won’t supply you with these or a list of where to find them. • Now, make sure that these files are shown in the dir browser by going to the menu General Settings > File View > Show Files and setting it to either Supported or All. • Locate the file in the browser and play it simply by clicking on it as you would a song.