For different liveries I recommend Spark IV, all you need to do i hover over the "police_sign_1" or whatever the first livery is and put it as the LA SD you want, then on the same vehicle you get the CHP Livery and hover over "police_sign_2" or whatever its labeled, and then you replace them so they have both liveries, you also need to make sure in the vehicles ide. it has +livery at the end of the vehicle you have multiple liveries for. But then again. this is for both liveries in ONE SLOT ONLY as in both in "police"