Upgrading from FreeBSD10-B3 to FreeBSD10-RC1 borked

[Zenny]

Followed the instructions here:
http://www.freebsd.org/doc/handbook/updating-upgrading-freebsdupdate.html

The upgrade borked.

Error message: Can't find 'kernel'

When I checked with ls /boot/kernel/, the directory does exist.

:-(

Since the system has encrypted root partion with ZFSonROOT, I tried to
follow instructions at
https://forums.freebsd.org/viewtopic.php?&t=8958 to boot with a livecd
and went to the shell prompt and tried to import the zroot pool with
'zpool import -f zroot' but it says no such pool is available.

How to fix it? Any hint? Thanks!