Speed up Virtualbox NAT

Tip from here:
http://techblog.geeksbrain.net/2012/11/how-i-solved-slow-windows-upload-speed-when-using-virtualbox-nat-or-bridged/

matthew@Precision-M4500:/etc/init.d$ VBoxManage list vms
"Outlook, Office and Win8" {3c343ab9-834a-41d9-a685-57fc678fa72d}
matthew@Precision-M4500:/etc/init.d$ VBoxManage modifyvm "Outlook, Office and Win8" --natsettings1 1500,1024,1024,1024,1024