(adsbygoogle = window.adsbygoogle || []).push({}); Hello everyone! Just bought a PS# with 4.87 CFW on it. I want to update to 4.91.2 Evilnat [Final], and i have some questions.

1) Do i just update via the USB from the XMB? do i have to enable QA flags or something? Also, should i prefer to use the recovery mode for the update?
2) Will i be able to play online? I'm intrested in playing BO2 zombies. Do i always have to disable syscalls?
3) Can i FULLY (from recovery mode) format the PS3 without losing the CFW? If yes, should i do it before the update or while on 4.87?
4) Should i enable cobra mode to play PS2 iso or can i load it direclty from multiman? Is cobra mode safe to enable in general?

That's it for now. If my post won't get deleted for being too noobie and on top of that you show interest in helping me, i might come up to you with some more questions if that is needed.
Thank your for your kindness!!!

Did you ever solve youre issue? apologies on the late response. I havnt touched my JB in years. Youre best bet would be to do some homework & research on YouTube and NextGenUpdate has alot of tutorials as well