thanks for the help!
it's for nothing that noble.. basically there's a torrent of godfather2 with 8 leechers stuck at 99%, but the only incomplete file is the ps3updat.pup.. in any case I tried to replace it with the one from marvel vs mk, but it fails the hash check. the game is of course fully playable even without that file, but i wanted to help out a bit and change it from being dead and unsearchable to being alive and well! not my torrent of course, i wouldn't mess up like that! 8)
strange thing is the ps3updat files are 137MB on the wiki, but 256MB on the marvel vs mk disc and the godfather 2 torrent...
anyway thanks again, really is nice to see so many helpful people!