USB Flash/CD Combo

Hello everyone, I'm new. :)

Anyways, I was using Knoppix last night, when I had this neat idea, as I tend to use this sort of thing for hacking my own computers if I lose or mess something up. What if you had a USB Flash Drive that forced the computer to boot to it, then gave a key to every cdrom in the system, which would start up knoppix. Then Knoppix would put the /home folders onto the usb thumbdrive. That way, Knoppix would work on computers with lost bios access (Since the thumbdrive would force it to boot from cd), you'd have 128MB/256MB/512MB/1GB of space to transfer files to, and the drive would be high security, maybe an encryption on the folders?

Anyways, just a thought for a little customizing, as I've got a ton of these thumbdrives laying around and don't know what to do with them.