As for the scale block, it depends upon how it is made. You could add a dimension to it and then resize it. I've always made my own in SketchUp. Then it's treated like any other viewport.
As for aligning viewports, you can use the alignment tools in the Arrange menu to align by the borders of the viewports. If you're actually trying to get the geometry from the sketchUp model aligned, move the little cross hair thing from the center of the viewport to some corner or edge or something. Then you can move that viewport so that point snaps to a corresponding point in the other viewport.