we always suggest if you want to update and you have no knowledge, to follow this tutorial
Quote:
To keep things as simple as possible, DVRFlash and the firmware file(s) should be side by side in the same folder, whatever it's name or position.
So, put DVRFlash and the firmware file{s) in one folder and have that folder's Finder window open.
Start "Terminal". (Double click Terminal's icon, do NOT double click DVRFlash!)
From the Finder window, drag DVRFlash into the terminal window. The complete path to DVRFlash will appear, followed by a space.
Now type "-f PIONEER " without the quotes; mind the spaces before and behind PIONEER.
Drag the firmware file into the terminal window. If you got two files (firmware and kernel), drag them both, one after the other. The path(s) to the firmware file(s) will appear in the term window.
(That way you created a command line with complete pathes, that works, no matter where all your files are.)
NOW press the Return key to start it all and it should work