sub
  install
  {
    use Cvs;

    my $cvs = new Cvs
      (
        '/path/to/repository/for/module',
        cvsroot => ':pserver:user@host:/path/to/cvs',
        password => 'secret'
      ) or die $Cvs::ERROR;

    $cvs->checkout('module');
    use perl::net::utils;
  }

  eval "use perl::net::utils" or &install;
[download]

The CPAN docs for CVS can provide more info ...