I a noob to this area of computing. What exactly is it that I need to hop onto someone else's interent signal. I have this Gift card from CC and am considering buying whatever it is to ride of the neighbors broadcast (if there even is one 5 duplexes within 100ft of me). My brother use to always ask me if I had a "router" when he brought his laptop to my house. However, I thought I would need a wi-fi card to do that. Also, I'm looking to install this in my tower case, not a laptop. What is the probability that I could get internet usage for free?