Its not easy to change ur ip u need to do it through ur isp which can take some while. They wont do it if u say "ive been banned of this website rah rah rah"
go to http://www.torrentspy.com or http://www.isohunt.com. Look for the file u want, download the .torrent fle open it in Azureus and watch it start downloading. And for a good p2p use bearshare. Google it