Using Content Manager, find the car you want to change, right click it and select clone to create a new version of the car. Then edit the cloned car by right clicking and select Edit - Edit in Explorer. Double click the config.txt file, scroll down to the queues section and change the initial count value from 0 to the quantity you want. Also change the username to something different so you and tell it from the original. Then save and commit.
Bob Weber