Gidday again

I am perhaps missing something. What I am interested to be able to do is click the 3D buildings layer and have the 1600+ buildings (currently labelled building 1 through 1600+ - but I know what to do about that!) turn on / off - as layers in GE, not as objects in my places folder? At present your excellent exporter exports 1600 3D entities but they are visible whether or not I click the 3D buildings button / layer visibility option.

Also, while i am at this submit questions level, I have a 3D shp / dxf contour map of 1m spacing contours across the whole city which currently imports into ADT / 3DS Viz / Sketchup or anything else with landscaping options as a simply massive file. I want to be able to draw on this stuff as terrain in GE, not make a many faceted geometry model... Is this an area where your brilliant shp importer / kmz exporter can assist?

Y