Thank you for your answer !
Here is my .ini file, I did not edit it directly, I have used the configurator.
[Main]
AdditionalCopCarModels=
SuspectTransporterModels=POLICE;POLICE2;PSTOCKADE;
VehicleTrunkWeapons=Shotgun_Baretta;
AllTextMode=True
AmbientScenariosMaximum=2
AmbientScenariosMultiplier=250
DepartmentName=Liberty City Police Department
DepartmentShortName=LCPD
FirstStart=False
UsingPoliceStationMod=False
DisableCameraFocusOnWorldEvents=False
DisableRandomPoliceChatter=False
DisableSuspectTransportCutscene=False
PreloadAllModels=True
Language=en-US
It seems that the modification you indicate me is already done, isn't it ?
Thanks again !