Still trying... and failing..
to copy the .iso to a partition failed giving an
cp reading ... Input/Output error
- then, by Googling a bit, I tried with
dd if=... of=...
but again, it failed copying the .iso. It usually copied a few megabytes and then stop...
That's when an idea come to my mind: copy the .iso from a Kingston Datatraveler USB pen drive.
So, I booted with a Damn Small Linux to a command line as a root and with some switches.
The USB pendrive was listed in /proc/scsi/scsi, and also /proc/bus/usb was mounted (but I'm not sure what would I want that directory mounted).
But, because of my bad luck, I wasn't able to mount the pendrive and browse the files inside it. Why? I don't know.
It failed to mount any /dev/sda* to /mnt/sda* telling me that
mount: /dev/sda* is not a valid block device
or other similar messages...The next steps
Tonight, or tomorrow, I will try to run a Xubuntu Live CD to see if it recognizes the USB pen drive and then copy the .iso to a partition.
Still listening to your advices...