I tried two-finger-click and drag. Nope, doesn't work.
I tried clicking in the bottom right corner with one finger, but can't seem to drag.
I'm on a early 2011 Macbook Pro running Bootcamp 4 and OS X Lion.
If you plug in a mouse it works, I don't have a mouse though so I've been hoping to find a solution to using the trackpad, and since Control-click doesn't work, I'm stuck.