Oh yea, my bad. I failed to mention that SketchUp won't import .OBJ by default. You may be able to find a .OBJ importer plugin, but looking around, it seems like the ones I found is down. The other option is to use another modeling program, to first import the .OBJ and then export it in a format readable by SketchUP ( When I do it this way, I will export it as a .dae) That should allow you to import the file, and break it down.