You can turn the FM transmitter with either Setting, Widget, Media player or Xterminal commandline.

Turn the FM-Transmitter on and set the frequency to what ever you like.
In this example is "99.6MHz"

turn on your Radio, and tune the freqency to FM 99.6Mhz,
that is it!! this is as easy as a child play.


Play the music from media player and enjoy your own radio station!!

Note: Sometimes the FM-transmitter may get a bit windy in sound quality and sometimes you can detect it at all. That is depending on your car stereo. Some car has fully sealed the radio signal from an outside. So the FM radio signal will not work inside the car.

Good luck.