INSTALLATION OF POSTGIS/POSTGRESQL ON CENTOS 5

Install PROJ
If you are missing proj based on above or running a version below 4.5, then install by following these steps.
wget http://download.osgeo.org/proj/proj-4.6.0.tar.gz
tar xvzf proj-4.6.0.tar.gz
cd proj-4.6.0
./configure && make clean && make
make install
ldconfig
cd ..
install GEOS
If you are missing geos based on above or running a version below 3.0, then install by following these steps.
wget http://download.osgeo.org/geos/geos-3.0.3.tar.bz2
tar xvjf geos-3.0.3.tar.bz2
cd geos-3.0.3
./configure && make clean && make
make install
ldconfig
cd ..

Install Postgresql 8.3.8
Exclude Postgresql from the CentOS base repository as Postgresql 8.3 is not included in the base repository.
echo "exclude=postgresql* >> " /etc/yum.repos.d/CentOS-Base.repo
Download and install the RPMs from http://yum.pgsqlrpms.org:
wget http://yum.pgsqlrpms.org/reporpms/8.3/pgdg-centos-8.3-6.noarch.rpm
rpm -ivh pgdg-centos-8.3-6.noarch.rpm
yum install postgresql postgresql-server postgresql-contrib postgresql-devel

Add:
/usr/local/pgsql/lib
/usr/local/lib
to "/etc/ld.so.conf" and run "ldconfig".

Retrieve the PostGIS source archive from http://postgis.refractions.net/download/postgis-1.4.0.tar.gz. Uncompress and untar the archive.
# gzip -d -c postgis-1.4.0.tar.gz | tar xvf -
Then run:
# ./configure
If you want support for coordinate reprojection, you must have the Proj4 library installed. If ./configure didn't find it, try using --with-proj=PATH switch specify a specific Proj4 installation directory.
If you want to use GEOS functionality, you must have the GEOS library installed. Geos 3.0.3+ is preferred and is required for some functions such as ST_SimplifyPreserveTopology to be available. If ./configure didn't find it, try using --with-geos=PATH to specify the full path to the geos-config program full path.
• Run the compile and install commands.
# make
# make install
All files are installed using information provided by pg_config
Libraries are installed [pkglibdir]/lib/contrib.
Important support files such as lwpostgis.sql are installed in [prefix]/share/contrib.
Loader and dumper binaries are installed in [bindir]/.
PostGIS requires the PL/pgSQL procedural language extension. Before loading the lwpostgis.sql file, you must first enable PL/pgSQL. You should use the createlang command. The PostgreSQL Programmer's Guide has the details if you want to this manually for some reason.
# createlang plpgsql template_postgis
Now load the PostGIS object and function definitions into your database by loading the lwpostgis.sql definitions file.
# psql -Upostgres -d template_postgis -f /usr/share/pgsql/contrib/postgis.sql
The PostGIS server extensions are now loaded and ready to use.
For a complete set of EPSG coordinate system definition identifiers, you can also load the spatial_ref_sys.sql definitions file and populate the SPATIAL_REF_SYS table.
# psql -Upostgres -d template_postgis -f /usr/share/pgsql/contrib/spatial_ref_sys.sql