WORKS.
I just tested this with a throwaway PSN account, and it worked for me. Popped the Brutal trophy, plus a bunch of other ones, as soon as I continued the campaign. I'm gonna play through the game on my real PSN account, enjoy the experience, and then use this to pop the Brutal trophy. I hate multiple playthroughs required for 100%'ing a game, so this is a great gamesave.
I am using Xploder on a OFW PS3 that has never been jailbroken. I'm also using a US copy, so I can confirm that the EU save works on a US game. Here's what I did. Hope it helps someone.
1) Booted into Resistance 3, first time ever. Started new game, let it create a new savegame. Quit out to XMB.
2) Copied the virgin R3 save onto my USB stick. There were two save entries created. Copied them both.
3) Plugged USB with the virgin R3 save into my computer. SHAkA's posted file also has two save entries. I copied everything except the .SFO file from SHAkA's gamesave onto my USB stick, overwriting my files.
4) In Xploder, two R3 saves show up in my USB list. I drag them over to the left into "My PS3 GameSaves", then drag them back from left to right back to the USB. This re-initializes the gamesaves for my PS3. (For more details, see
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5) Plug USB stick back into PS3. Copy the R3 saves from USB to the PS3 hard drive, overwriting.
6) I did get an error when trying to copy the 2nd save file. I just ignored it, and it worked anyway.
7) Boot up R3, choose "Continue Campaign", and the trophies will unlock immediately. I got: Brutal, Irresistible Force, Master Mechanic, Archivalist, Weaponsmith, and This is My Rifle.
Good luck.