Running a parallel job is just as easy as starting a serial job, while the time spent on a job can be reduced from several days to hours, or even minutes. Pelegant has been tested under both MPICH-1 and MPICH-2. We suggest using MPICH2 if possible, as it shows better stability in our regression test. In the future, we may also add new features available in MPI-2, such as parallel I/O, remote memory operations, to improve the performance of Pelegant for some simulations.