The Extended Upgrade System is a mod for The Witcher. This mod was created to give the items in the game more purpose. It was done by extending the duration of the upgrade system and adding more items to the game. The items that have been added are the following:

Special armors and armor sets

Diagrams and loot rates

Witch items and the witch hunters' armor

A new GUI for your screen

Installation

If you want to install it, just download the file from the website. You don't need to do anything else. The guide is very easy to follow, it only takes a few minutes to install it.