ok seems like old eboot isn't possible right now, gta just loads to starting new mission, no more happens and some other said to, i gonna make some more investigation regarding updates will try to make some update in the near future, see how it goes
hopefully within one day, i have some things on my mind to try ^^
Here is a thought maybe if the update files can be saved so that they can be installed when the ps3 is in normal mode it may work maybe because it is in a debug mode it cannot install right because the ps3 is looking for debug files.
well that's how you are able to install, but it makes a new EBOOT wich aint encrypted i guess, and replacing it with old apparently won't make it updated, or cant confirm, going to try some things when i have the time.
don't know if there is any other way updating games yet, and i don't know how many interested in it hehe.