#!/usr/bin/perl

use LWP::Simple;
use XML::RSS;

use strict;

my $base = '/Users/matt/Sites/html/rss';
my $rssFilename = 'yourRSS.xml';
my $file = "http://www.macupdate.com/rss/ratings.php?id=2:78a15f81822c3e5d3df18d4e0b99220c";

my $rss = new XML::RSS (version => '2.0');
my $data = get($file);

$rss->parse($data);

# convert 2.0 to 1.0
# $rss->{'output'} = '1.0';

# you could also manually open a file handle
# and write to the file handle with
# $rss->as_string;
$rss->save("$base/$rssFilename");