Is it possible to create a async operation in unity free?

Is it possible to create a async operation in unity free?
I maybe thought of a way :
I just do the game in one script and load a scene with Application.loadlevel() in another script. Because scripts can run at the same time and don’t rely on each other I have a Async operation now, right? Does this work?
Are there any other ways?

This works with Unity Free. What doesn’t work with Unity Free is asset bundle loading.