  We specialize the $N$ string scattering amplitudes for the generalized
protostring to $N=4$. This allows for a much more detailed and explicit study
of their basic physical and mathematical properties, such as singularity
structure and high energy behavior. Since this class of models does not enjoy
full Poincar\'e invariance, the high energy behavior depends on the Lorentz
frame. The relative simplicity of the four string amplitudes allows a direct
understanding of the complications due to this non-covariance.
