Hey man,can you explain what cfw's you have tried to install whilst stuck on RSOD Rogero?
I have used the Rogero downgrader countless times,I usually install 3.55 ofw via recovery and all works fine,but I've noticed you tried that!
Was you on DEX prior to downgrading??
I had a similar issue with a customer who used a 3.55 downgrader,no matter what Cfw I tried to install I would be constantly stuck in a loop on 3.55...until I tried a DEX Cfw and the update worked first attempt ( not sure if this is your issue,but I am just pointing out options so we can narrow the issue down )
Do you still have the hdd available when you downgraded using the Rogero downgrader? ( hopefully you didn't format it ) if so,place back in the ps3 until you have a working Cfw installed correctly!
Get back to me with the questions I asked you,if it does come down to a brick,you will have to flash your verified backup back to the console by soldering that wire I stated in your other thread from the tri state point to the sbe point on your ribbon cable ( there is another way to flash your backup,but I'm most familiar with this method )