It's a bit late in the game to be saying this, but here's a solution for people that want to earn trophies but can't buy/install an ODE and must buy a CFW PS3.
The Tales of Vesperia save files aren't copy-protected. Before earning a trophy, save your game in a new save slot and copy that file using a USB stick. Put the USB in your PS3 that's running OFW and then earn the trophy on that. After earning it just save your game again, copy the file back over to your CFW PS3 and continue playing.
It's a pain but that's what happens when you want to earn trophies while playing a game illegally. Well, I say that, but this only works if you actually own a legit copy of the game to play on your OFW PS3.
Happy Vesperia-ing!
The Tales of Vesperia save files aren't copy-protected. Before earning a trophy, save your game in a new save slot and copy that file using a USB stick. Put the USB in your PS3 that's running OFW and then earn the trophy on that. After earning it just save your game again, copy the file back over to your CFW PS3 and continue playing.
It's a pain but that's what happens when you want to earn trophies while playing a game illegally. Well, I say that, but this only works if you actually own a legit copy of the game to play on your OFW PS3.
Happy Vesperia-ing!