It took me some time to figure out how the hell to get the model converted but eventually I figured it out with help from Kargarok and others. Looking back at the process it took to convert the model to a bdl format, it wasn't too difficult to do but it certainly wasn't straight forward to be a simple procedure. But how the hell you were able to convert a dzb file to a google sketchup file in the first place is beyond me. It would be interesting if we could restore the old model by applying different textures(aka not all green...) to the bdl but I have no idea how to do that or where to even begin with it.
