Go to the official website www.zinetsatdw.com, click on downloads, choose other receivers, then select gn 1000hd with the most recent date, click on it and it will take you to the download page. Then decompress your file and copy it to your USB.
Plug the USB into your receiver, click on the USB button on your remote control, look for your decompressed file, when you find rom.bin double-click and follow the procedure until the end, there you go, it's done.
Plug the USB into your receiver, click on the USB button on your remote control, find your uncompressed file, when you find rom.bin double click and follow the procedure until the end, there you go, it's done.