Alternate planes in lesson mode?

I'm interested in trying to learn how to fly instrument approaches so
I checked out the lesson section of FS9. The lessons work OK but
here's the problem. I cannot find a way to switch airplanes while
taking a lesson. I have a number of downloaded planes that fly a
whole lot better than the plane I'm stuck in for the lesson. I spend
the first two minutes just trying to stabilize the altitude.

Am I stuck with that plane or is their some way to change the default
"lesson" plane? Thanks.
Rich Russel