if u have a psp i know how to do it works every time with a psv game save alright use you ps3 web brower go to the game save you want then hit triangle file open in new page then triangle again copy address of page go to wobzip.org click on uncompress from url then paste the game save link then click wobzip! go to where it has the file at bottom copy it to your psp under export/psv then go to memory card utility then go to your psp find the save and copy srry i ain't to good at explaining things i used the same game save just today it worked

Or just uncompress it using winzip, drop it into a folder ps3/exports after attachiing your PSP to your computer via the USB cable.
Export it to your PS3 from there. If you want to use it on the PSP, attach your PSP to your PS3 via the USB cable, click on the save inside the memory card utility you want to use, click triangle, then copy. It will ask if you want to convert, click yes. There you go!