On this website, select the car skin you are looking for.

Find the skin you like, and click DOWNLOAD.

A new “Google Drive” window will open, download the 7z archive.

Download completed, the archive has arrived at your home :D

Open RallySimFans Launcher, go to your cars, click on the car you want to add the skin for, and Import Skins.

Select your downloaded archive and click "Open".

A window will open, click on "Import".

Choose the skin in the RallySimFans interface and click "Apply".

In the root folder of your plugin, find and open the car folder.

Rename the folder "\Textures".

Drag Drop "\Textures" folder from archive.