ok man this is what i found.
i have never done it this way but its strait forward enough.
unzip the firmware v1.3 i picked the 12x double click to open the folder
then put a COPY of your orig firmware bin there
then doubble click the "make ixtreme firmware"
it will build your hacked ixtreme firmware
after it is done it will look like this.

then take a copy of that hacked firmware and put it in you usb boot drive in the backup folder in the same as the orig firmware is.
open backup folder
open ser # 1234567
open ser#12345
in there put your new hacked firmware.
then do the same thing as before but do the flash
fsam 1234567 12345 (i think is the command)
then the 10 sec trick
the same steps that you did to get the dump.
ive never done this just to let you know
BUT I THINK IT SHOULD WORK.
don't lose that orig firmware