errthang works great but as mentioned earlier my mobile ticks don't transfer. pantech burst
One issue I see is that any new routes added to an area that was already downloaded is not available. There is also no way to 'update' an area that is already installed to include any new routes
Updates are repacked every 1-2 weeks I believe, thus in a few weeks you can manually update any area. It would be an insane bandwidth expense if all the devices updated automatically!