You wouldn't have to do anything different than you do now. You log on to your computer, then connect to your VPN, then open your torrent program. You'll want to use one that sends the traffic through a county friendly to these activities like Canada or The Netherlands.

With some Google searches, I found out how to use Vuze with a proxy server - very different from just web browsing. You need to change certain specifications on your bittorrent client. If anyone here is interested, write and I'll send you the details.