I've followed this guide: https://help.ubuntu.com/community/LiveCDCustomization and when I boot my iso it appears a BusyBox showing this message: "unable to find a medium containing a live file system"" (/var/log/casper.log contains the same). I think the reason is that guide is obsolete. What a pitty!!
Could you show me some light about what can I do to try to solve this problem? I'm really stuck. Thanks, thanks, thanks a lot
P.S: I do not want to use Ubuntu-Builder or similar, because I want to learn how to do it "by hand"