This script will run a Gaussian job in the batch_12hr queue.

#!/bin/csh


#PBS -N test_12hr				### name of the job
#PBS  -m bea					### send mail about the job
#PBS  -M  jaimeco@pecos.rc.arizona.edu 		### send mail to user
#PBS  -q batch_12hr				### name of the queue
#PBS -l pcput=12:0:0,cput=12:0:0		### resource limits
						### cputime per process and total cputime
#
cd /xdisk/jaimeco 				### change directory to
						### my working directory (see xdisk)

./my-executable < my-input > my-output