balloon idea

I had seen the ideal arrangment as using the balloon with a reusable vehicle
that has ramjet first stage using the same fuel as the main engine.

Actually, this vehicle would work nicely with the ground-based launch rail,
too.

Of course, this gets away from my low-tech idea, unless you use a
pre-existing launch vehicle.

This is sad, I am beginning to argue with myself!

Does anyone know what a PEGASUS rocket could do if it were launched from the
rail launcher? Either the mechanical or EM version.