Here are two excellent tools for customizing the Ubuntu LiveCD. These are the tools that I use for building all the projects on Ubuntu Labs as well as Ubuntu Christian Edition. Reconstructor: Reconstructor is a Live CD creator for Ubuntu Linux. It uses the Ubuntu Linux Live CD as a base, and then allows customization of boot screens (usplash), gnome settings, and software (you can also use the chroot environment to make other changes before creating the live cd). Read more... Ubuntu Customization Kit (UCK): UCK is a tool that allows you to customize official Ubuntu Live CDs (including Kubuntu/Xubuntu and Edubuntu) to your needs. You can add any package to the live system, for example language packs, or applications. Read more...