Once everyone has it open, you can join in and play the game with up to four players.
All of your friends must have the mod installed and have a 1.0 version of Ocarina of Time downloaded. This will allow you to create an online lobby for your friends to play Ocarina of Time with your friends. Once you have installed the mod, you create a lobby for your friends to join on.
Dumping a ROM can be a little difficult, so make sure you check around for in-depth instructions and find the right equipment for your setup. In order to get the ROM, you'll need to dump it from an official cartridge in order to legally use it. Due to there being multiple versions of the Ocarina of Time out there, you need a clean version of 1.0. There's a number of emulator programs out there, just make sure you can support a. To start with, you'll need a ROM of Legend of Zelda: Ocarina of Time, along with an N64 emulator program.