Here's a simple (and hopefully self-explanatory) example:

#!/usr/bin/perl
{
package MyWebServer;

use HTTP::Server::Simple::CGI;
our @ISA = qw(HTTP::Server::Simple::CGI);

my %dispatch = (
    '/hello.cgi' => \&resp_hello,
    # ...
);

sub handle_request {
    my $self = shift;
    my $cgi  = shift;
  
    my $path = $cgi->path_info();
    my $handler = $dispatch{$path};

    if (ref($handler) eq "CODE") {
        print "HTTP/1.0 200 OK\r\n";
        $handler->($cgi);
        
    } else {
        print "HTTP/1.0 404 Not found\r\n";
        print $cgi->header,
              $cgi->start_html('Not found'),
              $cgi->h1('Not found'),
              $cgi->end_html;
    }
}

sub resp_hello {
    my $cgi  = shift;   # CGI.pm object
    return if !ref $cgi;
    
    my $who = $cgi->param('name');
    
    print $cgi->header,
          $cgi->start_html("Hello"),
          $cgi->h1("Hello $who!"),
          $cgi->end_html;
}

} # end of package MyWebServer

# start the server on port 8080
my $pid = MyWebServer->new(8080)->background();
print "Use 'kill $pid' to stop server.\n";
[download]

After having started the script, you should be able to access it via the URL you specified. Good luck.