If you want more information, read the rest of the page. You can also use angrylion-rdp-plus (Video) and parallel (RSP).
(Not necessarily the build found on this website.) This page will assume you are using Project64 v3.0 or later. What I’m interested to talk about are the Graphics plugins, the N64 Mouse support and how to load 64DD IPLs, required to play the games. I will assume you know how to set the controls and stuff. You can either download the original dumps, or the cartridge ports (but I don’t recommend those) both work. Project64 2.2 (and every versions before) doesn’t support 64DD at all, so you need a development version that you can find on the Download page.