flashwizard for netowrk or dreamup null modem cable

You can also use LAN together with 0-modem for DreamUP.
I've seen some people reporting problems with DM500 and newer versions of DreamUP so you might try an older version if this happens.

keep box power of

connect to pc using null modem RS232 cable

start dream up

click connect

when prompted power up the box

click flash when box has been recognized

if this is first time say yes to flash erase,

when prompted click flash and browse to the image on your pc

it will tell when the job is done