live booting

See the following -

Linux with ADRIANE Provide a Simple and Usable Menu System for Blind Computer Users

ADRIANE is a great interface with a solid plan for design and functionality. In a way, it reduces a computer down to a minimalist device tuned for the most common everyday tasks, so it might not be the ideal interface for power users (possibly an Emacspeak solution would be better for such users), but the important thing is that it makes the computer easy to use, and tends to keep the user informed every step of the way. It's easy to try, and easy to demo, and Knoppix itself is a useful disc to have around, so if you have any interest in low-vision computer usage or in Linux in general, try Knoppix and ADRIANE...