if you have a cfw 3.55 ps3 and a ofw 4.00 ps3 youu can put your own save from your user from the 4.00 ofw ps3 to the same user on the 3.55 cfw ps3... then you just download a 100% save from ngu and use ftp or filemanager and replace everything beside param.sfo and then you do data transfer from ur cfw ps3 back to the 4.00 ofw one... ( you cant copy the saves to a usb .. it will say they are corrupted , but if you do data transfer the game will still load it!) this worked perfetly for me and got me all trophies for completing the campaign on any difficulty and even veteran (this will only get you difficulty based trophies! nothing else).. btw .. i tryed the same thing for spec ops , but unfortunaltly it gives an error while loading it