Yikes this one took me a bit of time to figure out. I was installing an image remotely from my Mac, and the image installation edtior used the function keys to save, quit etc. Well on my OS X the function keys first are overridden to do specific things. Ok well just press the 'fn' key while pressing the function key. Oh now they are overridden for Expose and so forth.
Ok well what you are goign to want to do here is press the 'fn' key, the command key, and then the F# key you want sent to the Terminal.