How can I set music from my playlist as a ringtone on my Rant?

I've put the uploaded the song onto my phone, but it saved in my playlist. I want to have it as my ringtone. It's 30 seconds long, and the file format is 3g2.How can I set music from my playlist as a ringtone on my Rant?
You can't. All the providers have blocked the ability to use your own files for ringtones to protect themselves from ';piracy'; lawsuits, thank you RIAA. I'm a music lover, but I've boycotted the music industry because of their childish antics over piracy. That said, there's a way, google ';bitpim samsung';.