you can flash your 800 over lan by inserting the power lead and holding the front power button in, when you see stop and an ip address, take your finger of the front power button, then with your web browser insert that ip address and you will see the firmware page, click on firmware upgrade, browse your pc for the saved image then click on flash, when it gets to 100% press the front power button and it should reboot.
you can install pet settings which are channel lists with dreambox edit, but you still need to store each sat position manually if your not using usals.