anyone come across this problem . i have just got the game and whenever i launch it(PS3) i am told that it requires 1.5 gigs of free space but according to my ps3 system info there is nearly 4 gigs free. is there a limit to the amount of space used for game data??

Um, it's a 4.7GB install.

weird the message i get is that the game requires 1570 or some figure like that to install. deleted other game data and it installed.
never mentioned a 4.7gb install

The install is around 5 gigs, make sure you got atleast 6 gigs free if you can.