a) please always reply to the mailing list, not only individual people. thanks.
b) read the documentation. you can start here:
http://lammps.sandia.gov/doc/Section_start.html#start_5
here:
http://lammps.sandia.gov/doc/Section_howto.html#howto_10
and here:
http://lammps.sandia.gov/doc/Section_howto.html#howto_19
and then follow the links and read the README files and sources in the corresponding directories.