use lib qw(blib lib);
#use strict;
use warnings;
use Getopt::Long;
use Pod::Usage;
use Data::Dumper;
use Opsware::NAS::Client;

my($user,$pass,$host) = ('jon', 'doe', 'localhost');
my $help = 0;
my $ip = '127.0.0.1';
my $nas = Opsware::NAS::Client->new();
my $res = $nas->login(-user => $user, -pass => $pass, -host => $host, -nosession => '0');

my res = $nas->show_deviceinfo(ip => $ip));

#here's where the magic happens....

foreach my $tftp ($res->result()) {
        print "$tftp\n";
}
$nas->logout();

Here's the output I get from the above code:

DeviceInformation:
Contact: NOC 111-222-3333
Hostname: bob
Location: Creek
Manufacturer: Cisco
Model: WS-C3750G-48TS-S (C3750 series)
OSVer: 12.2(46)SE
Processor: WS-C3750G-48TS (PowerPC405)
ROMVer: 12.2(25r)SEE4
SerialNumber: Z4CF,FOC688
ServiceTypes: Power
SystemImage: flash:c3750-advipservicesk9-mz.122-46.SE.bin
SystemMemory: 134209536