I take it the plane doesn't have a net? Funny how simple things can be hard to do in PADS. Make a two pin part, one pin the size of the hole you want, and the other, if you don't want another hole, a surface mount pad. Add a net between those pins, and make your plane part of that net.
well that was first first approach, just have 2 pads, but I thought there'd have to be a way of eliminating the hack. Not a show-stopper, just seems a bit clumsy or hackish.