Sorry if this has already been addressed, but I've been at this for the last 4 hours (it's 6.45 am now and I need to get ready for work).

Thus far, I have learned that before starting on step 7 of post #1 of this thread, one should partition the card first.

sudo gainroot
umount /media/mmc2
sfdisk /dev/mmcblk0 -uM
1,14000,0C
,,,
reboot

sudo gainroot
umount /media/mmc2
mkdosfs /dev/mmcblk0p1
reboot

sudo gainroot
umount /media/mmc2
mke2fs /dev/mmcblk0p2
reboot

sudo gainroot
umount /media/mmc2
cd bin
./nupgrade.sh 0
yes
./nupgrade.sh 1
yes
./nupgrade.sh 2
yes
./nupgrade.sh 3
yes
./nupgrade.sh 4
yes
reboot

After all this, it's still not booting from the MMC.

Did I go wrong with a step somewhere?