Silly me,
here comes the URL:
http://luminance.londonmet.ac.uk/learnix.
The difference to what Terry posted some time ago is that KNOPPIX/LEARNIX doesn't require any manual configuration (except on rare occasions, e.g. for the screen resolution), and the ESP-r is also new. Note that KNOPPIX uses a compressed file system, so there are more than 1.5GB of applications on the CD, such as OpenOffice 1.1...
Cheers
Axel