1) Net::FTP is probably already installed on your machine, it's listed as a dependance just for the record. If you don't know how to install Perl modules you should read this first.
2) Test script in v_1.01 did in fact skip user and password parameters. This has been fixed in v_1.02 so you can test it with real users (other than anonymous). Beyond that, make sure you properly configure user access control on your Hylafax server.
3) There is no "executable". This is a Perl module you use in your own programming.