marcus.bauer at gmail dot com writes that:

Creating a customized GNOME liveCD yourself is easy and takes just a
few minutes of time:

It involves three simple steps:

1. download and unpack http://project77.info/gnomelive/liveCD-0.2.tgz
2. ./make_livecd.sh en en_US
3. burn the resulting .iso onto a CD-ROM and enjoy!

You can customise in an effortless way:

* the default language
* background images (boot splash, gnome splash, desktop)
* add sample files to the Desktop
* add and remove packages