I know this topic, is a little old, but I´ll take my chances to ask some qustions.

I have a Zephyr with the CB version 4578, and I´ve managed dump the NAND successfully. This dump was done a year ago, and I was told that this version could not be hacked running a version of freeboot.
As I can see from this tread, the Zephyr with CB version 4578 is able to run freeboot. hmmmmmmm
Is this for real?
Will I be able to read out my CPU-key with this program?
Can I use my dumped NAND to get this key, or do I have to reconnect my JTAG?
Hopefully some of you guys in here could help me out.
THX
Yes, Zephyr with CB 4578 can be jtagged, but by using all the Jtagging files present for Falcon consoles.