So, I've been out of the PS3 scene for a while (I was here for the GeoHot jailbreak era), and I've just recently picked up a CECH-2501A. Sadly, this unit came equipped with 4.41 OFW out of the box, and from what I've read, the only method of getting it onto MFW/CFW is via flashing hardware IF my model even supports it.
What I'm curious about is, how come there is a 4.41 CFW (Rebug LITE), yet it needs to be installed through an older CFW and can't be installed directly from the XMB on the OFW. Did Sony patch something along the lines that checked for legitimacy with update files that no one has seemed to crack? And if so, how does anything on 4.41 CFW work if nobody knows exactly what keys/syscalls 4.41 uses?