Thanks, it seems interesting.

I tried all that you said, and it seems to work.
Well I think I have to make some improvements like to download all the stuff in a single directory and make a new packages.gz to put all of them in a single USB stick
But, as I'm a newbie in linux it is quite difficult to me.
Also it would be interesting to make a script to make all of this in a simple click.
Can anyone help me?

Thanks