use WWW::Mechanize::Firefox;
use Win32::GuiTest qw ( SendKeys
                        SetForegroundWindow
                        FindWindowLike
                        MouseClick
                        );
my $mech = WWW::Mechanize::Firefox->new();
$mech->get($downloadpage);
#At this point I'm prompted to download the file..
Win32::GuiTest::FindWindowLike('Opening dailyfiles_txt.tar');
Win32::GuiTest::SendKeys("{ENTER}");