this is a skinpack for PDash app
http://www.racedepartment.com/downloads/pdash.6138/
v1.5
extract in
steam\SteamApps\common\assettocorsa\apps\python\PDash
open the file steam\SteamApps\common\assettocorsa\apps\python\PDash\cfg\master_config.ini and select the skin
ex: skin1 = motec green