Unpack CDLC & Add Section Markers

So, I've gone through and used the Dynamic Difficulty Creator, but I'm faced with another problem - most of the songs that once lacked Dynamic Difficulty also lacked section markers. Which means, as a result, when I enter the Riff Repeater, it's either the whole song or none of it. Is there a way to retrieve files from the CDLC pack to add section markers to break up a song?