I like the idea of UnknownMaster21.
The max users on a host doesn't change, and if there is any S1 or S2 user, they can still participate when the grid is full with 12 demo users.
You should drive to the place where you want them and get their coordinates.
Then you could type a command to get your position, or you could make a createbutton to see every different coordinate if you move (If placed inside MCI_Update).
I suggest to use CompCar.
I made a command to toggle the coordinates on and off on my screen.
I am using Createbuttons and drive to the place while you continuesly see your coordinates, if I toggled it on.