SB5101 Certs on a SB6120

[legendofsounds]

Do not use WinSCP use the GUI to add your certs, you only need these two and to choose the manufacturer of the cert you are importing (in this case its motorola so leave the default)

fw_key_prv.bin <=
fw_cert.cer <=

Dont forget to change your MAC and change your Serial too in the GUI

Thanks for your help Rickendo. I tried what you said but still getting errors. I just noticed in winhex that the cmnonexp111.exe extracts the certs from the nonvol but they have the same length as original (after making them with buzzcert). based in the tutorial, cmnonexp is used to get the correct lenght. Is this part of my problem?
after using cmnonexp the legh is the same:

public.key 8B
private.key 289
root.key 10D
cm_cert.key 326
ca_cert.key 403

For some reason 5101 certs could never be loaded into a sb6120 weird idk why

Same thing happened to me but using certs from a sb6141 to a arris tm822

If you find a fix let me know
Here's the link where I posted something similar to your post

http://www.haxorware.com/forums/showthread.php?tid=5582