Hello... Would you mind explaining a bit more on the steps necessary to load a game?

A.) Do I make a rom folder inside the extracted 3DNES folder?

B.) When you say "Change its name to match rom file, (mario.3dn matchs mario.nes)." do I download a Super Mario Bros 3 .nes file and and change it's name to mario.nes?

C.) And when you say "open rom file" do I go to the previously mentioned rom folder and open mario.nes file?