I've just been playing around with scenes and I can see how they might be useful. It looks like they are a screen which you could place buttons on to run tasks, like opening folders, changing settings e.t.c.
I've made a basic one to test some stuff out, know how I can open it?
Good choice for a new thread.
There's an article here:
http://www.pocketables.com/2012/09/beginners-guide-to-tasker-part-3-scenes.html
You need to create a task that invokes the scene.