1), If the widescreen versions are too big, then yes, you'll need to use the 2010.set screen.
2) Drag the lower right corner of the window to fit the screen, and you won't see those numbers, which were intended to be hidden. (You can't see them on a 1024x768 monitor)
3) Go to the toolchange tab and enter a value larger than 0 in the Clearance Plane DRO.