Great Job, just spent 1.5 hrs reading every post on here - learned about everything from pink foam to plastic epoxy - amazing.
From what I've read about booting to flash based media, I am under the impression that this is basically just a simply bios option that you change, was that the case on your mobo? I've got a spare 1gig thumb drive laying around, was imagining that might work for this application.
Once you've got your stripped down OS installed, and you've erased all the drivers, do you just install the hardware (FM tuner, wireless keyboard, whatever) that you're going to use, and then prevent it from being writable - and shazzam? Sounds too good to be true!
Great job, great thread, keep it up man!