How much of the psp update Eboots have been decoded?

[Jazneo123]

K so im looking through the pspgo's update 6.20 Eboot and was wondering how much of the psp's EBOOT.PBP have been decoded (how much is understood) So far i only understand the hex in english at the top and the png info. EG Can change the name that psp shows for the eboot and can also change the update image. However if i run the eboot it states that the file is corrupt. Is anything known about the psp's CRC checks and stuff? Any info on the psp's eboot or eboot hex editing would be greatly appreciated.