Re: how do i hide my ip address.
I'd have to question why also... though that's not a moral thing. It depends on what you're trying to do. If you want to anonymize P2P traffic, you'll probably want to seek out a VPN service. Want to visit or download from websites restricted in your country? There are a good few reliable proxy add-ons that can help.
You can also make use of a free PPTP connection on your computer and route traffic through it. That can get pretty complicated very quickly if you don't know the first thing about proxies, but it pays off beautifully for me and Crunchyroll, Pandora etc. Again, it just depends on what you're trying to do.