(adsbygoogle = window.adsbygoogle || []).push({}); So I can sign into playstation network, but I cant mod more recent games like GTA V because my system is on a lower version.

What version should I use?
And do I need to use the .999 PUP Downgrader to install a new CFW? Or can I just go from my current firmware, and install it and it will update without messing up anything?

Skype : "WTGReszka"

Thanks