Sorry for the long delay in updating this site as I had a personal problem to take care of.
I don't know what the newest downgrader goes up to, but my advice is that if you want custom firmware, DO NOT upgrade to any newer Sony firmware updates.
Eventually someone will release the appropriate downgrader for you.
Sony releases new security measures in each update making every new firmware harder to downgrade, so if you keep updating via Sony's server you won't be able to downgrade at all.
Does he have like a team or something behind him on the psp messing with it?
Sony needs to hire this guy he seems to be doing more by himself then Sony is doing with the psp. X kernel and up these days" there are emulators specifically for the slim i.e. they dont need the 1.5 kernel edit: from the comments on the link icedman204 says: I've tested a few 3kernel homebrews and they seem to work so far :) June 28, 2008, pm The updating method provided in the link only works for previous M33 Custom Firmwares.
Official Sony firmwares must be cracked and downgraded before upgrading to your own custom firmware.Unfortunately for you, you'll have to wait until someone figures out how to downgrade from official firmware 4.01 or higher.Well it seem the Play Station Homebrew community has a bright 2016 year ahead Thanks to a few Play Station Dev’s that have been working on the Play Station 4 gaming system to unlock/Jail Break for it’s full potential , giving owners of PS4 system able to run homebrews applications and game and/or CFW (Custom Firmware) develops by the Play Station Dev’s community.So stay tuned to the latest Play Station 4 Homebrews news .This site is currently being work on and setup , I’ll do my best to update this site with the latest information regarding the Play Station 4 System as it becomes available and time permit .Old PSP Homebrews , Custom Firmware as well emulators will be restore little by little as times goes by .