Extract and put on usb stick. and in menu ,you select utility and usb (upgrade).. after that do your antenna setup and scan, then load file for x-2 dongle with wiznet.
All STBs with USB ports for loading files, allow you to load a file via USB port. If for any reason you are unsuccesful, you can always revert to the old method of uploading a file via serial port using a straight or a null serial DB9 cable. All downloaded files come usually as zipped files - some come with rar comression. In either case, you have to unzip and extract the file from inmside and that is the one you use for uploading to the STB.