If you don't have permission to install a Perl module into the system Perl directories, you will not be able to use CPAN or yum or atp-get etc to install the module. You have to manually install it. Here are the steps:
- Download the module's package from search.cpan.org
- Install the package:
$ tar zxf module-name.tgz
$ cd module-name
$ perl Makefile.PL PREFIX=/your-custom-dir
$ make
$ make test
$ make install