OK. You need to add this line to the freeplaybase.xml or freeplaybase_d.xml if you have deluxe in the specs folder. <vehicle prototype="mod:Prototypes/Vehicles/03 LA Police/secret_service_suv.e4p" count="1" /> It needs to be exactly like this. You need to add this line to the portraits.xml file in the specs folder. <portrait prototype="mod:Prototypes/Vehicles/03 LA Police/secret_service_suv.e4p" text="SECRET_SERVICE_SUV" unit="SECRET_SERVICE_SUV"/> I think these are the only files you need to edit.