title: How to set iOS's ringtone from a tweak
body: <p>i'm writing a tweak for iPhone that at certainly point needs to set the ringtone, but i'm not able to find how to do that.
  Can someone tell me how to do that, put me in the right direction where to look or just tell me a website where to search or maybe in some wiki?
  All i've found are useless answers.</p>
  
  <p><em>More Info:</em>
  I need to know how to set ringtone for a tweak so the solution can be only for jaibroken devices.</p>
  
  <p>Thanks!</p>