Hello, I am brand new to this and have a couple of questions. I am getting my droid tomorrow and I am considering rooting it for a couple of reasons(wifi tether, and full control over something I own being the main reasons). On the videos I have seen for rooting and unrooting your phone it involves deleting and installing a file called "update.zip" which brings up my first couple of questions. 1. Is it possible to keep the Original "update.zip" file on your sd and just rename it? That way I don't have to search the internet later and download the "unroot-update.zip" file in case I need to unroot. 2. If that is not possible(I don't see why, but like I said I'm new) would it work If I just copied my original sd card that comes with the droid to another sd card? That way I could keep the original as a backup, then if I need to unroot I could just switch out cards. Thank you.