Still, in the end, it's not music composed for the movie. It's music composed for other movies that you think could fit. Nothing entirely wrong with that, but while we're at it, let's replace James Newton Howard's score for King Kong with Howard Shore's music from the Lord of the Rings. Or replace John William's score for Superman with music from Jerry Goldsmith's body of work.

But if you do this yourself, Cameron originally wanted Enya to do the songs for the movie. So you can throw in some Enya songs. And apparently, he also wanted Reba Macintire for Molly Brown so maybe you can cut and paste some footage of her from her sitcom or something.