Delete the old skins from where they were installed previously and replace them with the provided files.
RDGTC_Sky_Speed_Sports_24 should be replaced in \Steam\steamapps\common\assettocorsa\content\cars\ks_ferrari_488_gt3\skins
RDGTC_STR_Racing should be replaced in \Steam\steamapps\common\assettocorsa\content\cars\ks_lamborghini_huracan_gt3\skins
RDGTC_Sky_Speed_Sports_24 should be replaced in \Steam\steamapps\common\assettocorsa\content\cars\ks_ferrari_488_gt3\skins
RDGTC_STR_Racing should be replaced in \Steam\steamapps\common\assettocorsa\content\cars\ks_lamborghini_huracan_gt3\skins
