So, a quick update.
I WAS going to test a brand-new recovery image I made, but unfortunately, I am a little slow, and accidentally destroyed /dev/mtd/mtd1, rather than /dev/mtd/mtd5.
For those of your paying close attention to my root instructions above, mtd1 is the system partition. Oops!
Now my girlfriend's phone doesn't boot so well, and unfortunately, without the image I just made on the recovery flash.... even the spare Devour I have lying around for backups won't be able to be applied.
Well, I guess this means I'm out of the scene until tomorrow, when I try to get the phone fixed.
(I'm in trouble now!)