I dont see any way to have the wizards call another wizard in such a modular way.
The problem I ran into in adding functions is the tightly designed screen graphics- that already shows a bit on the main screen where a couple of the later functions have different graphic styles, and are kind of squezed into place.
I am not opposed to adding other features into the main set if there is enough demand for it
With some of the new features promised for V4 it would be possible to do a wizard set like NFS, but with lots more future expansion possibilities. Brian and I have talked about this a lot, and many of the changes to the V4 wizard calling are because of these discussions, and similar topics with the MachStd Mill set. We will see how much can be done.