There are two versions of this mod, one at normal speed and one that's sped up. To install, put ONE folder in tf/custom.
This song might cause headaches due to infrasound. It's not guaranteed to give you a headache, though. I've tested it myself, and I didn't get a headache, but the original mod was trashed because of infrasound/headaches. If you get dizzy, or if you get a headache, or if your ears start ringing because of this mod, delete it immediately. You have been warned.