thank you for the link. Please don't assume that all people are experts in web resarch.
I donwloaded the file but I can't load it into the 5260.
I have setup Serv-U FTP with a 10.0.0.2 IP and the home directory is c:\5660 - when I try to load the firmware I get the following error.
Server IP: 10.0.0.2
User Name: xyz
File could not be downloaded
It seems that I have setup the server correctly since when I try to load the new 5660.img directly without any hex editing I get the following:
Error: image platform [0x3] expecting [0x5]
File could not be downloaded.
so this tells me that I have setup the server correctly?
Still no clue on how to hex edit the new firmware as I can't find the entries 0xe0 and the check sum at 0xfc.