I've been looking to upgrade to the ICS leak but need some guidance in how I would go about doing it. My current version is 5.9.905.XT875. How can I go from 905 to the 230 ICS leak? My device is currently rooted as well. Would I need to unroot and go back to 902? I'm in dire need of help; I don't want to wait for the official OTA update!