I've added a modified version of vvvvvvmusic.vvv to use with the level, including nine previously unseen tracks made by me! I really love this new soundtrack; it fits the levels of CCCCCCCCCC better than the original VVVVVV soundtrack in my opinion.
To use it, replace the vvvvvvmusic.vvv file in your data.zip with this file and start up the game! just put it in your VVVVVV documents folder and start the game up.