To generate  collisions at a given energy and write result to stdout so
that they can be an input to the primary file to Epics. (file name should
start with +).  Also you can generate a kind of trace files to visualize
particle tracks at each collision.  (Use geomview).

If you use an interaction model other than dpmjet, 
you may directly go to the section of how to prepare the
param file.  For dpmjet, you have to read the next section.

1)  preparation of files for dpmjet.
The standard files for dpmjet are organized so that the
maximum lab energy is 4x10^14 eV. This is not enough for
,say, generating collisions at LHC energies.  Therefore, 
we have to prepare appropriated files at such a high 
energy.

We distingush  projectile and target for the collision.
Collision generation is performed at the rest system of
the target and the resultant particle information is
obtained in the original system.  (Say, cms where
the target is moving).
Let's suppose that the projectile is a proton or hadron
(not heavy ion).
a)  Target is a proton.   
	a-1)	In this case, you may 
		cp protonTarget.inp  dpmjet.inp
	a-2)    Edit the dpmjet.inp:  adjust the
		ENERGY as you want.
	That's all.Then,  you can goto param edit
	section to run	the job.
b) Target is a nucleus
	Not ready as of Aug. 17, 2005
