I am planning on switching to the 4gb tethering plan, which is apparently a very uncommon thing, as the only info on tethering I have found is on how to do it for free. I assume the approved version is a little different, so I have a few questions (I'll be using usb tethering). Do I need to download anything on my Atrix or computer beforehand? Is there some AT&T or Motorola provided app I need? Are there any settings I need to adjust? I haven't had access to wifi for months, so I haven't been able to grab the last couple updates. Will that be a problem? Sorry if these are obvious questions, but I haven't been able to find any kind of guide on this and I just want make sure everything works before I go and give AT&T more of my money. Thanks.