If you don't want to change the cell scale (or create another one for the correct scale), then either use the InRoads Global Scale Factors when you display it, or go to the Named Symbology for that ROW Feature and change the X / Y scale in the Cross Section Point 'Use' ...unless it is set to the Default Point 'Use', then change that one of course.
Oh, and that document that you referred to is old. That tool is now under InRoads > File > Import > Surface on the From Geometry tab.
Oh, and that document that you referred to is old. That tool is now under InRoads > File > Import > Surface on the From Geometry tab.