root@zeroshell chiavetta> gunzip -c zeroshell.img.gz>/dev/hda1
this should be root@zeroshell chiavetta> gunzip -c zeroshell.img.gz > /dev/hda
because /dev/hda is your harddrive and /dev/hda1 is only the first partition on your harddrive.
You MUST put the image on the entire harddrive not on one particular partition !!!
I checked the mentioned installation instructions which definitely says HDA and not HDA1.
Hope this helps!
Greetz from Austria
RaVEn (biggest fan of ZS !!!)