Try this first.
Play your game and save.
Copy the save onto a USB and open in PC
Copy all the files from the downloaded save except SFO file to your save. (Make sure you have a back up).
Resign the save and copy to USB and to your PS3
IF this does not work, continue reading...
Play your game and save.
Put the save on a USB and open in PC
Copy the Game ID, the folder should be something like NPU.... (Copy your NPU...)
Using PS3 SFO editor, open the SFO file of of the gamesave you downloaded.
Go to advanced edit and replace the BLUS/BLES... with NPU...
Save, and overwrite the existing SFO.
Rename the folder of the same folder (the one you downloaded and the one with the newly edited SFO) with NPU...
Resign and Copy save to PS3
This should work. I tried this with cheats and it worked. It is similar to resigning to different regions.
Originally posted by Nite1
can u be more specific?