install:

add line to /etc/apt/sources.list

<code>deb http://www.remastersys.com/ubuntu [distro] main</code>

try running

<code>sudo apt-get update</code>

if it fails because of the public key, do the following:

<code>
gpg --keyserver pgpkeys.mit.edu --recv-key [KEY-FROM-ERROR-MESSAGE]
gpg -a --export [KEY-FROM-ERROR-MESSAGE] | sudo apt-key add -
</code>

links:

http://www.miketyka.com/2012/01/creating-a-ubuntu-livecd-using-virtualbox-and-remastersys/

http://en.kioskea.net/faq/809-debian-apt-get-no-pubkey-gpg-error