The Retrofit Mod requires M2TW: Kingdoms.

To install the Retrofit Mod, simply run the supplied executable file. If you
have a valid installation of M2TW: Kingdoms, installation setup will
automatically determine the installation path and appropriate language assets
(game audio and text) for the Retrofit Mod.

The Retrofit Mod installs all game files into a separate mod path and does not
modify any existing M2TW or M2TW: Kingdoms files. This protects the existing
M2TW and M2TW: Kingdoms installations and allows multiple mods to be run from
the same M2TW installation.

Installation consists of four main components:

- Required Retrofit Mod Files: Core files required to install and use the
Retrofit Mod. (REQUIRED)
- Copy M2TW Campaign Files: The installer will copy the required campaign files
from the original M2TW installation. (REQUIRED)
- Copy M2TW Custom Battle Files: The installer can copy the custom battle files
from the original M2TW installation. (OPTIONAL)
- Copy M2TW Save Games: The installer can copy save games from the original
M2TW installation for use in the Retrofit Mod. (OPTIONAL)