well I was asking to find out if you have an 'easy' aux in... if so that is 10X better than any FM transmitter... YMMV
noooo... i wish. that would be the easiest way, but alas i dont.
you can use an FM Modulator.
http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/car/peripherals_installation_guide.html?page=3
that's the best way to go if you don't have an aux-in.