What do you mean with "correct title"? EBOOT.BIN it's the correct name for all the executables of every PS3 game. As a rule of thumbs you should never rename anything. That way, you'll save yourself a lot of headaches like the one you're having right now.
In your case, you could try instead of renaming the eboot.bin, making a copy and renaming it as the correct title. That way RPCs3 won't throw an error when launching from the gui.