The following is a kludge, but may be worth a try:

Change the second:

=head1 SYNOPSIS
[download]

=head1 MAIN
[download]

and then invoke pod2usage as:

Pod::Usage::pod2usage( pod2usage(-verbose  => 99,
                                 -sections => [ qw(MAIN) ] ) )
    if ( $CONFIG{ 'help' } );
[download]

See -sections in the “Arguments” section of Pod::Usage.

Hope that helps,