Installation
- I highly recommend that you also use the mod Legendary Smithing Upgrades. It will make it so most of the added leather and other items will get the extra bonus that's unlocked by smithing perks for other materials.
- Download whatever part of the mod you want.
- Open the archive and copy the ".esp" file within to the "Data" folder in your Skyrim directory.
- Make the game load the esp by checking the tick-box next to the newly added in the Nexus Mod Manager for example (you could enable it manually by editing the plugins.txt file).

Uninstallation
- Remove the ".esp" file from the "Data" folder in your Skyrim directory.