#!/bin/bash

#$ -pe orte 8
#$ -q parallel-R4.q
#$ -cwd
#$ -S /bin/bash

export LD_LIBRARY_PATH=/opt/intel/fce/10.1.012/lib
    # ...environ. var. to ensure ifort-related .so libs found...

/usr/local/openmpi-1.3--ifort-v10--gcc-v3/bin/mpirun \
    -np $NSLOTS myprog
    #
    # -- All on ONE line!
    # -- Many "mpirun"s on system --- ensure we get right one...

More:

• Environment variables