Unfortunately, I am reading the forum with my 770, and I just jumped to the end. If I make the extension to root, if I use the bootroot application, this will allow me to switch between booting of the mmc card, and booting straight from the device?

I doubt that I am going to remove my card, but I want the comfort of knowing that should my mmc card get damaged, I will always be able to fall back to the default layout.

Assuming that the above is true, when I boot off of the default root filesystem, how does the mmc look to the 770? For instance, if I create a directory on the mmc filesystem (lets call it /home/user/ebooks), and later on I decide to boot back into the 770, can is still be able to point the 770 to the mmc card to view my ebooks with no problem?

Like I said, I don't plan not to not book off the mmc, but I like to know my options!