How to choose vehicle for scenario?

I have made a scenario but my problem is that I want the player to be able to choose their own vehicle at the beginning of the scenario. This would be similar to GamerGull's scenario here https://www.beamng.com/resources/asphalt-dirt.10056/

Could anyone help me with this?

 

"Hey man, as soon as you start the game press option's and click the gameplay tab make shure that the competitive scenarios box is NOT checked. Then you can pick any car for any scenario"
I read the original statement wrong lol and just posted. This would be the only way if you cant figure that out.

Next time put stuff like this in "Troubleshooting: Bugs, Questions and Support"

 

That is not what OP was asking about.

 

I do realize that now lol, I do not know anything about scenario building myself. My b

 

Even though this did not help, I still learned this neat trick. Thanks!