Well, I thought someone with somethng nice to say should come in here.... so - today at work I read on my favorite tablet forum that there was a diablo update available... and that it breaks your tablets boot menu and was sent from hell to kill us all.... So naturally the first thing I did was happily instal it the most logical way i thought possible... I boot from an internal MMC diablo and diablo on flash...so:

1) I booted to internal MMC; saw the update notification.. went ahead and updated..it warned me i would reboot - and I already knew my bootmenu was going to be hosed. So; it gets done; without error; and reboots.
2) Tablet reboots into flash on it's own... I run application manager and check for updates.. install 2 new updates... tablet reboots again; still in flash - and I get a pretty little "operating system updates installed".
3) Removed penguinbaits bootmenu-installer
4) Re-installed penguinbaits bootmenu-installer (took a while.. but still worked fine).
5) Reboot and select internal MMC
6) Boot into internal MMC and get my pretty little "Operating System Updated" message.

And voila - Internal MMC; and Flash; updated and re-loaded bootmenu all without incident and no cloning or recovery necessary...

So... I'm happy.