I think people need to understand there is no change at the moment with regards to who can use this, if you are on 3.55 then make sure you have run toggle_qa to rehash your SYSCON just to make sure before using this (even if you didn't downgrade). I was on Rogero 3.7 and it worked a treat after using toggle_qa as I had originally downgraded (I always do this after downgrading which I have done on mine several times).
If you are on 3.6+ and have never been able to run 3.55 because your Playstation is to new, this has not changed overnight and at present you are stuck (model numbers above 2500 and certain 2500 versions).
If you are on 3.6+ but your PS3 has been on a lower firmware in the past then you will need a flasher (E3, Progskeet) and a downgrade dongle. You then need to downgrade, run toggle_qa, go back to 3.55 OFW and then upgrade to 4.21. Ensure you have quadruple checked your flash dumps BEFORE you doing anything, even use the forums/IRC to get one of the devs to check it if you are unsure.
That is it! hope it helps as I keep seeing people asking "can i use this" type questions, PS3 wiki has a list of PS3 model numbers that can be downgraded so have a quick look there.
Hopefully one day the guys with PS3 versions that can not be downgraded will get there wish and get CFW but it is not there yet!
Hi. I'm new to this cfw thing. Following it for a while. Unfortunately didn't get around to putting 3.55 on my ps3. Here's my first noob question.
It's my understanding that these new custom firmwares can be installed on an ofw console? If that's the case then hell yes! I will wait until more tests are done etc. my luck I would get a fancy paperweight! Sorry for the long winded post