Hacking 4.85 OFW to Ferrox 4.85 CFW?

[d1zz0]

Hi,

I've got a CECH-2504B with minimum firmware version 3.50.
Now I'm wondering... what would be the best way to get the currently 4.85 OFW to 4.85 CFW by Ferrox?

Hoping someone will like to point me to the right direction. Thanks in advance.

 

[d1zz0]

nevermind:
that did the trick