I am looking to change the firmware in my mvision HD200 receiver so that I can get the Tivusat channels. I know that speedy 4.61 will work. I know that this can be done using the usb port - but what do you need to do? There is another piece of firmware with the speedy firmware - SWUpper.UAD - must this be loaded in first. How do you select from the menu to upgrade via the usb? I've tried looking on the net but I can't find any instructions.