You know what? I'm too lazy to post all the links.
Here you go ->
http://sites.google.com/site/urbrhypopradiostations/
The stations with the lower numbers are the most important ones, so start requesting at the top and go down the list (on top 40 mainly, i think? Maybe also HAC.)
On the mediabase link then (where you request) you have to look if Disaster is in the list, it's possible. If it is, then choose it there (maybe along with some other "flop" songs, because they hate fan requests) and then scroll down, write your name and the code and click on "submit".
If it's not in the list, then scroll down, and fill in "Jojo - Disaster" once in this box ("Don't see your song above? Type it in here!" ) and in the other 2 boxes you write some random songs. Again, fill in your name and the code at the bottom and click "submit"
phew. I think this is it xD