This is untested code, but I use something similar at home when I scrape images:

#!/usr/bin/perl
use warnings;
use strict;

#
# warning: untested code.
#

package main;
use WWW::Mechanize;
    
my $mechanize = WWW::Mechanize->new(autocheck => 1); 
    
# define useragent
$agent = "Mozilla/5.0";
$mechanize->agent($useragent);

# get the url
#
$mechanize->get("http://www.site.com/images/");
#
# get the images
#
my @images = $mechanize->images();
foreach my $img (@images) {
    my $time = time();
    my $filename = $time . ".jpg";
    my $mech2 = WWW::Mechanize->new(autocheck => 1); 
#
# Save the images
# Use the fact that WWW:Mechanize objects are 
# overloaded LWP::UserAgent objects.
#
# please see: 
# http://search.cpan.org/dist/WWW-Mechanize/lib/WWW/Mechanize.pm
# and look for $mech->get
#
    my $mech2->get($img->url(), ":content_file" => $filename );
}
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