I am attempting to edit a Fedora 19 DVD ISO to add a kickstart file. I then need this ISO burnt to a USB stick for instillation.

The error I get when booting is

Warning: Could not boot.
Warning: /dev/root does not exist

To try and determine which part of the process is failing I have broken the process down in to separate stages.

Step 1:

Burn the original ISO "Fedora-19-x86_64-DVD.iso" (Available -> here) to a pendrive and see if that will install.

dd if=/path/to/iso of=/dev/sdc

Burning this image was successful and it installed without issue.

Step 2:

Exctract the ISO, repackage it and burn it to a pendrive and see if that will install. PLEASE NOTE: The final command in this section has been broken down in to multiple lines for ease of reading, in fact it was run as a single command on one line.

mkdir -p /mnt/linux
mount -o loop /tmp/linux-install.iso /mnt/linux

cd /mnt/
tar -cvf - linux | (cd /var/tmp/ && tar -xf - )

cd /var/tmp/linux

xorriso -as mkisofs -R -J -V "NewFedoraImage" -o ouput/file.iso 
-b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 
-boot-info-table -isohybrid-mbr /usr/share/syslinux/isohdpfx.bin .

This iso was then burnt to a pendrive as before.

dd if=/path/to/iso of=/dev/sdc

This ISO burnt to the pen drive with no problem and will boot. I then see the fedora options screen. After choosing either "Install Fedora 19" or "Test this media & install Fedora 19" I then receive the errors highlighted above.

This means the kickstart file is not to blame, but repackaging the ISO. Is there something I am missing in the repackaging process?

Any input would be great!

NOTE: If it is of any help, I attempted Step 2 with an Ubuntu server ISO and the process was successful.