Credit to all the modmakers who created the mods I used in this modpack. (Which includes the modders who created Optifine)
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (Legend PixelPack) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Legend PixelPack from the list on the left. The launcher will handle everything else!