It is not clear to me what the codes are for formating strings. (ie. %s, %d, %.3, etc.) I can't seem to find this in the docs anywhere. Any assistance?
put to your vi String/Format to string.vi. Double click on it. You will see open window, where in bottom line you can write different codes (%s, %d, %.3, etc). In top of window you will see explanation what this code is mean.