I managed to get it working without editing anything really. I have kmeaw 3.55 cfw. and I had two folders that contained my original save. So initially I tried to modify the SFO manually and that went terribly wrong. After that I tried just transferring this save directly to the hard drive but the game didn't read that either. So then I tried this method (not trying to advertise anything you will have to put in the .com

psx-scene /forums/f180/tutorial-use-any-save-any-game-make-game-think-its-your-save-78890/ anyway that didn't work however I noticed at Step 5 he said to delete the contents (not the folder or it's name) and copy the contents of this hacked save over to that folder and i'll be shiz if it didn't work. Be sure to make backups of original just in case!
I still managed to get trophies when I did this in fact when I leveled up my party points I got 2 trophies right off the bat. Also keep in mind you will be right at the beginning of the game on this save but considering what you get it's Well worth it.
Good luck I hope this helps!
Quick note My original game save was located in a folder that had BLJM at the beginning of the folder and this one was BLUS I don't know if that's significant as to this success of this method or not just thought I'd put that out there. before someone says it didn't work for them.
BTW I used multiman to transfer the data from this save to the folder for the other save.
Oh One more thing I managed to do this with a USB I didn't do the FTP transfer so if anyone has problems you might try to do this with USB.