Download and install normally through MO2.JIP LN Overhauls INI Installation instructions: It is especially important to read the descriptions of these mods (you should still read the description of every mod), so you know what has changed and how to use the new features.
These mods are not recommended for a first playthrough of the game. This page contains mods that greatly overhaul the game by making it much more challenging (and more rewarding in turn) and adding new features.
