you’ve asked for advice and i have given you advice and i stand by it. what i have described is how i would set up such a system.
now you are telling me, that you want to have a different advice, because of important information that you have withheld in your original query.
in other words, you have made me waste my time, which is something that i don’t like (or do you like to waste your time?).
that puts you on my “naughty” list and you’ll have to hope for some other of “santa’s helpers” being in a better mood than you put me in.
how to create an input for LAMMPS is described in the LAMMPS manual, and there are several tools listed at: http://lammps.sandia.gov/prepost.html
good luck and happy holidays,
axel.