How to backup the existing/original ROM?

[Guest datristan]

windows xp file has "trojen horse backdoor.small X.VX" virus in it...

can you re-upload?

[Guest claus1953]

I just used this tool to dump my original ROM before i do some flashing. Lastnikita mentions 2 files but on my device it only dumped one of 130MB, the second one is empty, called Part2.raw (0MB).

Is it ok with the first dumped part, and has there been some progress in flashing it back?