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QG updates for SCORPIO.

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docs/user_manual/installation.tex

 \subsection{Parallel I/O using Sarat Sreepathi's SCORPIO library with PFLOTRAN}
 \label{parallelio}
 
-The parallel I/O library enables a scalable general purpose parallel I/O capability for HPC by taking advantage of existing parallel I/O libraries, such as HDF5 which are being widely used by scientific applications, and modifying these algorithms to better scale to larger number of processors. The library has been tested with MPICH-3.0.2 and OpenMPI-1.6.
+The SCORPIO (parallel I/O library) enables a scalable general purpose parallel I/O capability for HPC by taking advantage of existing parallel I/O libraries, such as HDF5 which are being widely used by scientific applications, and modifying these algorithms to better scale to larger number of processors. The library has been tested with MPICH-3.0.2 and OpenMPI-1.6.
 
 \normalsize
 It is recommended that values for the variables {\footnotesize\tt HDF5\_READ\_GROUP\_SIZE} and \linebreak {\footnotesize\tt HDF5\_WRITE\_GROUP\_SIZE} be set in the input file. 
 \normalsize
 % (Sarat: Not necessary) Number of MPI tasks should be an exact multiple of {\footnotesize\tt HDF\_READ\_GROUP\_SIZE}.
 
-For more details on the I/O library, please see Appendix A in Sarat Sreepathi's \linebreak <admin@sarats.com> \href{http://www.lib.ncsu.edu/resolver/1840.16/8317}{dissertation}.
+For more details on the SCORPIO library, please see Appendix A in Sarat Sreepathi's \linebreak <admin@sarats.com> \href{http://www.lib.ncsu.edu/resolver/1840.16/8317}{dissertation}.
 
-Instructions for downloading and installing the parallel I/O library for use with PFLOTRAN is provided below. Note that this software is separate from PFLOTRAN and under a LGPL.
+Instructions for downloading and installing the SCORPIO library for use with PFLOTRAN is provided below. Note that this software is separate from PFLOTRAN and under a LGPL.
 \begin{enumerate}
 
-\item Download parallelio\_lib source code for building the SCORPIO library:
+\item Download source code for building the SCORPIO library:
 
 {\small\tt svn co http://ascem-io.secure-water.org/ascem-io/scorpio DIRNAME}
 
 \footnotesize
 {\tt setenv SCORPIO\_DIR <your-iolib-install-dir>} \hfill {\it (tcsh/csh shell)}
 
-To compile the parallel library, check to make sure that the Makefile has the right settings for your machine.
-Typically, the current configuration suffices.
+To compile the library, check to make sure that the Makefile has the right settings for your machine.
+Typically, the current configuration suffices. So you can just follow the instructions below.
+For advanced users, please edit the section for {\footnotesize\tt pflotran\_machine} in the Makefile as desired.
 % So just uncomment the line {\small\tt MACHINE=pflotran\_machine}.
 % \footnotesize
 % \begin{Verbatim}