1) Have you tried applying a large scale to your ground plane? This should be sufficient in most cases. You can also take a look at the following thread which describes a method of creating a truly infinite ground plane,
http://www.worldviz.com/forum/showth...3?threadid=197
2) If you have an nVidia Quadro graphics card then you can use Quad Buffer stereo by initializing vizard with the viz.QUAD_BUFFER flag. Otherwise you can download nVidia's stereo drivers, which will automatically render your scene for shutter glasses.
3) I can't tell why the object is not being rendered. Make sure that the visiblity flag of the object is not set to 0 or that the alpha is not set to 0. Also, make sure that the object is not being occluded by another object.