How do I remove the ‘Please remove the installation medium, then press Enter.‘ screen?

I am working on modifying a live image of ubuntu for use as a bootable DVD. I have the image almost exactly as I want it, but I cannot find what to remove or modify to eliminate the ‘ Please remove the installation medium, then press Enter.’ screen.

How do I remove this screen from a live image?


add the bootcode noprompt to the appropriate lines txt.cfg/grub.cfg.