Instructions
Downloading the Emulator
Go to www.pj64-emu.com and click "downloads."
Download the Project64 v1.7 under the "binaries" folder.
Run the program to install Project 64, the Nintendo 64's emulator, which will allow you to download and play games on your hard drive.
Download the Games
Visit www.emuparadise.org, where you can download a ROM file, which is essentially the game and its files formatted to play on the emulator.
On the menu on the left side of the screen, click "ROMs, ISOs, &Games".
Select "Nintendo 64 ROMs" under the "consoles" menu.
Download any game you want. Here, the games are listed alphabetically. Save the file you want.
Open the Project 64 emulator and click "file" then "open ROM" to open the game of your choice.