Take a look at cpan.com or perl.com.

If you get module errors like that and there aren't any 'use' or 'require' statements in the script related to the module with the error, then it is because the module that is listed depends on other modules to be installed in order to work (in other words, they have 'use' and 'require' statements embeded in them the same way the scripts do, and the errors will be passed to the script).

But anyway, um... well, if you look closely enough in the config files and scripts, these modules are listed.

--Drew