Find this part in the LASiren.script file (located LAmod/scripts/game/command/) StrCompare(v.GetPrototypeFileName(), PROTO_FBI_SUV) == 0) { int random = Math::rand()%2; if (random == 0) { soundID = Audio::PlaySample3D("mod:Audio/FX/Sirens/Siren05.wav", CarPos, true); } else { soundID = Audio::PlaySample3D("mod:Audio/FX/Sirens/Siren06.wav", CarPos, true); } } Change both of these lines soundID = Audio::PlaySample3D("mod:Audio/FX/Sirens/Siren05.wav", CarPos, true); to soundID = Audio::PlaySample3D("mod:Audio/FX/Sirens/ALTERNATE SIRENS/Siren05.wav", CarPos, true); That should do it P.S this will also change the, LASD_VAN, BOMB_SQUAD, HUMMERH2_LASD, WATERCANNON, RESCUE02, RESCUE01 and SUV_LAPD vehicles. If you dont want to change them, write back here and i can change it for you.