[[WF]Demon]

pawn Код:

stock RegisterStaticVehicle(vehicleid,isdrivable,owner[]="0", vehjob=-1, vehfaction=-1)
{
    new plate[50];
    VehicleInfo[vehicleid][visvalid]=isdrivable;
    format(VehicleInfo[vehicleid][vowner],MAX_PLAYER_NAME,"%s",owner);
    VehicleInfo[vehicleid][vfuel]=100;
    VehicleInfo[vehicleid][venginestate]=ENGINE_OFF;
    VehicleInfo[vehicleid][vislocked]=0;
    VehicleInfo[vehicleid][vhasinsurance]=-1;
    VehicleInfo[vehicleid][vmodel]=GetVehicleModel(vehicleid);
    VehicleInfo[vehicleid][vjob]=vehjob;
    VehicleInfo[vehicleid][vfaction]=vehfaction;
    format(plate,sizeof(plate),"[FC]%d - [%d]",random(99999-10000)+10000,vehicleid);
    VehicleInfo[vehicleid][vlabel_plate]=SetVehicleNumberPlate(vehicleid, plate);
    return 1;
}

You were not using SetVehicleNumberPlate right at all.