How to install (You may not need this):
- open your lotus exos 125 (stage 1, preferably) folder [assettocorsa\content\cars\lotus_exos_125_s1\skins]
- open this skinpack .zip folder
- select all the folders 
- drag and drop / copy and paste the selection into the lotus folder
- run the game and have fun!
So please, don't ask me to improve the skinpack in that direction.