Found this file released on the net, filename "PS3UPDAT.PUP" that is 98.21mb in size. Maybe something to play around with.
To quote the following:
As gamers queue up to recieve their brand new PS3 consoles the big guys back at Sony have been refining the install method of the PS3's firmware update. With PS3 firmware v1.10 being released, gamers are half way between being able to interface their PSP's with a PS3 console. According to Sony's PS3, this firmware update will provoide "various functional additions and strengthening of security."