1. Create the file ".mpich" in your home directory with the following
   lines:

setenv MPICH2_HOME /usr/common/mpich2-1.0.7
setenv PATH $MPICH2_HOME/bin:$PATH
setenv LD_LIBRARY_PATH /usr/common/mpich2-1.0.7/lib:$LD_LIBRARY_PATH

2. Issue the commands:

argo > mkdir hw1
argo > cd hw1
argo > cp /usr/common/mpich/share/examples_logging/cpi.c .
argo > mpicc -o cpi cpi.c

3. Create the file "my_script" in the hw1 directory with the following
   lines:

#!/bin/tcsh
#PBS -V
#PBS -l nodes=5:ppn=2
source $HOME/.mpich
cd ~/hw1
mpiexec cpi

4. Issue the command:

argo > qsub my_script

When I issued this command this morning I got the output:

3962.argo.cc.uic.edu

which means that my job number is 3962 and the output of "stdout" 
and "stderr" went to the files:

my_script.e3962
my_script.o3962

When your run has finished, these files will appear and you can check
your results.