If I had the source to Hermes 4b, to compare to the PL3 payload, I imagine the offsets are pretty close, relatively, between 3.41 and 3.55.
It should be possible to extrapolate a "3.55" version of the Hermes 4b payload, by offsetting values the same difference as the PL3 3.41 -> 3.55 changes.
With the latest patcher, all we need to do is compile the payload binary and drop it in to test, and there's no risk of bricking, since it flashes nothing.
Working hard on UberCFW, incorporating NTFS, sub-free NetFlix and Blockbuster, PSN cheat system with built-in swearbot and MAC-spoofing, Adding MKV, RAM and BIK movie support, and Xbox360 emu*.
*not really. Get a life, newbs...
My YouTube channel: http://www.youtube.com/user/BenJeremy