The "probe" is usually the tool. Actually, to use the screenset as is, it needs to be the tool.

Make sure that you set the Clearance Plane to a high enough value so that all tools will clear the plates, and buy a safe margin. There's some info on this in the 2010 manual.

Keep in mind that the maximum probing distance is coded at 150mm (assuming you're using metric). If you need more, I can tell you how to change it.