If you are thinking about going this direction then might as well put a high powerfed external USB wifi card on the N8x0. search this forum for "packet injection" chats and you will find some people using the external wifi for hacking into secured wifi connections. They already have some type of driver working but please research this before taking any action.

Here are a few examples of using just a parablic dish to amplify the wifi strength without spending much money. Yes it actually works with the NIT too, just you have to hold it in the center of the dish.

http://www.usbwifi.orconhosting.net.nz/