I was able to get the unlock.bin from the guy who sold me my One X off Craigslist. I have seen the various guides on how to upgrade one's firmware. Now, in order to upgrade my firmware, do I need to be able to open that file? (I tried to open it and it says that my computer cannot read that type of file) Or, do I just need to have it (and not open it) in order to "point to it" in the upgrade process?