I definitely wasn't planning on doing that. I was thinking more along the lines of, for example importing the midi with a melody and bassline, then add chords, drums, ect. Basically as an alternative to learning the song from sheet music or transcribing by ear and then putting it in manually note-by-note. In the end it would be a full remix, I just didn't want to get in trouble at some point for using an already done midi as the foundation.
Of course. I'm working on that, but I'm still a long ways off from being proficient at it and I don't see why I shouldn't do other aspects of remixing and arranging in the meantime.