Ok, as root, I had to do the mount command
(you might need to mkdir /debian first)


Then I had to use my very newest version of the chroot scripts to chroot in. You need the new version, otherwise you could overwrite important files.

The /home/user/.chroot file needs this:
It will fail to mount the partition, but you've already mounted it manually, and then it works.

I was able to do apt-get -f install in the chroot, and it installed then rebooted automatically... back to my flash partition! Yay!

Note, I cleared some space to get it to finish the install... You'll need to do it too, if you're in this boat.