156w ago - Since the release of PSGrade there have been lots of PS3 Downgrade Hex Codes for all types of devices, and today Matrix15 and xXJohannXx of Logic-Sunrise.com (linked above) have posted a PIC18F hex code and guide which can be found below.
To quote, roughly translated: After leaving the downgrade for the different clones based Atmel microcontroller, the service mode is finally available to the dongle-based ICP such as ZBN SPI USB V1, V1.1, V2 , or PS3liberator NbzgroovePIC v1.0 at PICDEM bootloader is available.
The downgrade process is similar to any other dongles, you'll need: downgrade-files (http://www.logic-sunrise.com/telecharger-172586-downgrader-files.html)
1 - Upgrade your NbzgroovePIC or module ZBN with the update for the downgrade. (The update is done the same way that a jailbreak for maj.)
To quote from the official site: Porting the .hexes from the daily new payloads is taking me more time than I expected, and since you deserve a faster port of the payloads to the PIC18F devices I decided to invest some time in a new HID Loader 2.0 with a new "any hex" Import Feature, basically with this you dont need to wait never for me to port the payloads to the MAXAVRUSB 1.2 32KB or to the PIC18FUSB devices.
Just do the Import of the .hex from any ATMEL device (Teensy suggested) and the new application will convert to the PIC format. I have tested with kakaroto, psn yes, hermes, etc. Consider this new feature as BETA. CLICK...
Just under a week ago we reported that Medal of Honor was working with Open Manager for PS3 JailBreak users, and today datalogger (JasonMcKey on Twitter) has updated the PL3 Payload which fixes the 80010019 error that Medal of Honor and other new PS3 titles gave users prior to updating them to run.