I recently installed initfs flasher on my n810 and I was able to get it working and boot from the internal media card. I could only get it to work with version 1.2007.42-18 or 2008OS, I had upgraded to .42-19 but I was not able to get it working until I downgraded back to .42-18. Also when the boot menu comes up none of the keys on the n810 work so it just boots to what I have set as default (mmc2, partition 2) after the 30 secs or so count down. But other than that I'm able to boot into the internal media card on the n810 with version 1.2007.42-18 of 2008OS.