How do I randomize the filename/directory of a file the way this article suggests?

[w00ttastic]

We've had a problem of users continually posting Youtube videos with that horrible, evil autoplay function, so I'm channeling my inner Hammurabi in making a creative punishment. I'm making a forum style that autoplay users will be restricted to, and I want to have an annoying mp3 playing in the background at all times. Unfortunately, if I just embed the mp3, the user can just adblock it and move on. But this article:

http://robrohan.com/2007/09/14/howto...resistant-ads/

has a great idea, to randomize the filename and directory. The author even gives code that will do this. However, having no experience coding, I have no idea how it would be applied to vBulletin. I'm running 3.8.3.

Thanks!