Hello, sorry for sort of necroing this thread, but has doing this actually worked for you? I have tried to do this myself, however the game just considers any custom defined VEHICLE_RESPONSE group as a replacement for the VEHICLE_RESPONSE_DEFAULT response type. In other words, when adding any VEHICLE_RESPONSE_###### group, it just spawns that agency instead of the LSPD. I have not figured out a solution, and I have been trying to do so for over a month now.