UPDATE 2015! USE THE FOLLOWING HOST FOR DIRECT MP3 LINKS @ https://kiwi6.comHOW TO ADD SONGS TO YOUR PROFILE VIA DROPBOX.COM NOTE: YOUTUBE URL's WILL NOT WORK!1) Register an account on the kiwi6 website.

Log in and the main home screen upload the
MP3 file you wish to use as your profile song.

2) Wait for it to upload (Obviously....)
3) Once uploaded you'll get to this page, copy the DIRECT HOTLINK it will look something like this:
http://k003.kiwi6.com/hotlink/4hp4cp6n8y/Soviet_Anthem_1984.mp3
4) Paste the URL in Profile > Forum Profile and click save changes:

And just like magic it's done... Soviet anthem for me now..
Hope this helps...