How to upgrade the DVR?

	1, copy the file "master_boot.img" to USB pendrive' 
	2, plug in the DVR, and select [MainMenu] -> [SYSTEM] -> [Maintain] -> update [BIOS];
	3, copy all other files to the pendrive, plug in the DVR 
	4, restart the DVR . the screen will show the notice "updating..."
	5, modify the MAC Address of the DVR (MAC_adress_modify_manual.doc)