doesnt work..well not for me anyway...i have 3 sb5100i that are ok with the lights, if you plug them in the power comes on and the recieve flashes as normal, but when you press detect flash it says "no flash detected" i have had these modems for ages...i tihnk i must have stopped the flashes mid way or something...tried your method and they are exactly the same...blackcat 1.28 will let me press write all tab and select the file but it goes from start to finish in 3 seconds, so i know it hasnt flashed...older blackcat software wont even let you press write all....i also have an old sb5100E yes thats right an sb5100E...this does the thing where the lights come on for a second then all go out and is the same, no flash detected...this still didnt work after i tried your method...so thats a total of 4 modems i tried with and no joy....