I used Math's unpacking tool on the 1.05 GT5 update that my PS3 keeps asking for and everything unpacked perfectly i'm busy setting up my virtual machine atm so i can decrypt the new EBOOT but just though i'd post it here if anyone wanted to take a crack at it.
Once the eboot has been changed to use the 3.41 keys we can just overwrite the new files that come with the update via FTP and use the new eboot and it should be fine.
lol i did this last nite over at ps3hax... but opening the eboot in winhex and changin 35000 to 34100 didnt seem to do the trick (not tested myself tho)
it needs be extracted but i cant seem to find the WINDOWS tool to do it ?