There are times when one needs to think outside of the box.....

I and others here use a DAW for editing our projects. Simply export the tracks, slice and dice as needed in the DAW where it's so much easier to do.

Doing what Matt mentioned is a relatively easy job in a good DAW. I've done this exact thing. Generate the song twice with different styles or whatever and reassemble it to your liking in the DAW.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.