Just to add to the instruction above to help avoiding the problem I had when trying to install the image to flash.
Wanted to install via Web Interface - put DM8000 into deep stand-by, switched it off on the back panel, then pressed (and kept pressed) the channel down button on front, switched the box on again from the back panel and waited for the IP to show up on LCD, but it didn˙t appear. Repeated the same several times but no luck, no IP. Eventually I found out the following:
To get the needed IP I have to switch the box off (on the back) from the switched on mode (working), not from deep stand by. However, if you put the box to deep stand-by, you may (according to the instruction above) get the IP switching the box on with the power button (which I haven´t checked) and not using the switch on the back panel.