Forgive me if this has already been suggested but I couldn't find anything exactly like my idea. The only thread that's similar is nearly two years old. It would be very useful to be able to use vehicles other than the single option given to you by the level's developer in scenarios and campaign. A menu similar to quickplay at the start of every official and modded scenario and campaign that would allow you to use whichever car you'd like. Even having just the ability to change it once you've started the scenario would be enough. I understand that they chose the car that they did for a reason but it'd be fun nonetheless. It'd even be useful for doing comparative tests between vehicles.