It sounds like you should do the scale before the move.
Change File->settings->advanced->info-decimal-places (and restart).
The 3D model will zoom around it's current center. If you find that you are zooming too far, try selecting a central part of the model and pressing 'f' to center the 3d view on this - then you'll be able to zoom really close.
Export->Vrml-2-Proto will export protos which you can then instance seperately, is this what you need? Or do you mean export the source code to create an OpenGL display list? (if so, see the AC3D loader/viewer on the resources page)
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