I have been trying to customize Ubuntu 8.04 (hardy heron) alternate install cd. I have followed the community documentation at https://help.ubuntu.com/community/InstallCDCustomization#Generating_a_new_ubuntu-keyring_.deb_to_sign_your_CD to rebuild the ubuntu-keyring packages. But when the media boots I get a warning:

anna[7581]: WARNING **: bad md5sum.

Though I have not been able to confirm that the message is for the ubunu-keyring-udeb package, the nearest debconf Adding [package] message is for ubuntu-keyring-udeb.

This is followed by:

INPUT critical retriever/cdrom/error.

This message is already from syslog. I don't think dpkg.log will help in this case. I have tried modifying the md5sum file within the source package manually and signing it with my own public key, before building it. But that has not helped either.

How do get the installer to work in this scenario? Alternatively, can I customize the contents of Ubuntu8.04 without signing anything?