As far as I know, each time you connect, Tor picks an exit node for you and does not allow you to specify which one you want to use. So you can't specify, for example, that you want to appear to be in the UK. You will appear to be in whatever country it selects.

If I'm wrong about this I'd like to know, as that would be a useful feature.

Dan <img src="http://www.traveltalkonline.com/forums/images/graemlins/Cheers.gif" alt="" />