That's a great question. I would think that you could get a CD image of Knoppix stripped to essentials for viewing PDF's and JPG's or some similar on a CD and still have plenty of room for all of your document images. Then you could find any intel hardware with a CD drive and boot from your CD and be good to go. Just a thought. I should be possible to have such provide a ready to go desktop with only the ability to view documents and add documents in restricted formats such as PDF so that they remain uncorrupted and don't rely on the OS presently installed on the host machine.

Things that make you go, Hmmmm.......