Yes. FMs library will run your existing sketches.
Righto, will change to it then. Care to shortly tell me whats new on it? Other than it runs the i2c lcd:s?
Thats good that it only supports 4bit. I do have some lcds which have the 16 pin headers. But when i learned that i dont need them all i only soldered the necessary ones to make it a bit simpler.