MIDI's OH YES
Thomas there is nothing wrong with using midi files for remixes thats what its all about if you cant play or arnt musical it will save you time rather than trying to work out notes, chords etc. the thing i will say is stop using FL it is a good program for basics but you'l never get anywhere making full songs with it.
Please contact me if you would like to use this in a project. We can discuss the details.