perl Makefile.PL INSTALL_BASE=/mydir/perl

% cpan
cpan> o conf makepl_arg INSTALL_BASE=/mydir/perl
cpan> o conf commit

perl Build.PL --install_base /mydir/perl

% cpan
cpan> o conf mbuild_arg --install_base /mydir/perl
cpan> o conf commit

use lib 'directory';
use Parallel::ForkManager;

perl Makefile.PL LIB=/my/perl_modules/lib/
make
make install
PERL5LIB=$PERL5LIB:/my/perl_modules/lib/
perl myperlcode.pl

wget http://search.cpan.org/CPAN/authors/id/S/SZ/SZABGAB/Parallel-ForkManager-1.06.tar.gz
gunzip Parallel-ForkManager-1.06.tar.gz
tar -xvf Parallel-ForkManager-1.06.tar

perl Makefile.PL PREFIX=/home/username/myModules
make
make test
make install

use lib '/home/username/myModules/bin.../Parallel';
use parallel::ForkManager;