The SafeImg program for PS3 that released recently, may be useful for those who are want to transfer big games into their PS3.
With Safeimg (v0.1.1) you can remove videos from the games, reduce its size, split files larger than 4GB into formats supported by any backup manager, so the game run like it is in two disks (like God of War 3 and newer games), remove updates and other things.