I downloaded the text::csv module but not sure where to put in it the directies listed.

The idea behind modules from CPAN is that they should be installed by following a procedure rather than manually placing the files into a tree somewhere (some may require compilation, others will have dependencies, most will have a test suite, etc.). Have a read of the articles listed in the Installing Modules area of the tutorials section. You can come back here with any follow-up questions.