Players of the FallCraft modpack will need to download this map to be able to take full advantage of the features in the modpack.
If you want to play the modpack from Curse you will need to download this map. Simply extract the contents into the folder for the modpack instance on your computer. This will be wherever you installed the Curse client to.
Typically this will be [path to Curse install]>Minecraft>Instances>FallCraft>saves (This is supposed to be this path so you can create a new map using the template, you then create new world to start playing if this is done properly).