The article says that we can try this on firmwares higher than 3.55 and see if we can downgrade. How would one do this? I don't see how recovery mode can be used to downgrade, but perhaps I missed something. I currently have ofw 4.00, which can be downgraded, its a very old PS3. If anyone knows if this is safe to use on my firmware, and a way I can install it as I do not have an e3 flasher or a progskeet, please let me know.