you cant flash this you will have to put the files on the internal sdcard
then use root explorer or adb to move the files into place, recovery goes to
/system/bin and the keys to /efs, update.zip is the clockwork recovery and
stays on the sdcard.
when you boot into recovery and choose re-install packages clockwork will
be able to do its thing.
I do like the sig verification but it's a PITA and may disable it, this is a temp
fix until I can finish hacking on recovery there is very little clues as to where
the functions are so it may be a few days.
forgot to mention to you also have to remount /system rw
mount -o rw,remount /dev/block/stl9 /system