I don't remember if I changed anything in the BIOS, but the Enhanced Edition recognize my GPU.
The game work better, officially auto-detect want me to put the game at ULTRA. Doing this I go around 25 FPS at the start of the game with my 750M.
Working with the setting, I choose HIGH but put shadow to very low and everything else to OFF.
Game looks great and I have around 45 FPS, wich is fine for that kind of game.