I bought an X1 1 week ago with a 14 day trial period, and it has the 4.1 firmware, needs to be updated to the 4.3 version. How hard is it to do, and what is the cable I would need to do it? Do you hook up X1 to your computer and download from Infocus' website? If I took it back to Circuit City(where I bought it) could they do it for me? Do all projectors require periodic firmware updates? Thanks.