Here is link to some tutorials.http://www.ideaspectrum.com/arch2012_tutorials.php
Scroll down to 'Customization'> Import SketchUp / 3DS
or from the program (up top tool bar)
Tools > Model Import Wizard
also under 'Help' > Model Import Wizard
Make sure your model has been exported to a folder as a 3DS file and all textures will be in the folder. One thing I do before exporting is to set the underside of the roof to the same 'shingle' texture as the top of the roof, otherwise the underside will bleed through the upper.
I don't know about transparent windows in the new version of Realtime, but I believe if you set your windows to the 'inside' they are transparent from the outside but solid color from inside view. Reversed if set to outside.
You may also want to turn off the terrain. Any trees / plants should also be off when exporting to 3DS.
I resize after importing.
Play around and you'll get the hang of it. You will love the camera tool and how you can set views for each 'node' when laying out the camera path for 'movies or walkthrough). You can also do walkthroughs with keyboard arrows. Only the 3D trees will 'move' in the wind, not plant 'images'.
Good Luck !!