@jossll
Download the mod from the Google Drive link, then extract the mod files. There's a folder called images. Grab all the .iwi files and place them in the "AppData\Local\Plutonium\storage\t6\images" path.
For the sounds, just find where you installed the game and add the missing files to the sound folder.
@vHxtezYou
Sorry for the 6-day late response.
I recommend using this application (7-ZIP) to open zip files for not only me but a whole lot of other folders with the extension of .7z: https://www.7-zip.org/
I would've created the file in .zip, but it passes the maximum limit of space, so .7z was my next best idea.