its more a hardware dependent than software... so cannot be added on our ace..
if u are looking for ur car.. there are lot of fm transmitter available, through which u can play through ur usb drive, sd-cards, and even ur phone (though aux in wud also be needed for phone)..
try seraching it on ebay.
HTC ONE M7-U - Unlocked - Hboot-1.57- S-Off- ARHD 71.1
Nokia Lumia 800 - Windows 7.8
- Broken R.I.P
Micromax A110 - Drained in the Rains
SPECIAL THANKS TO ALL THE DEVELOPERS... YOU ALL MAKE THE USAGE OF PHONES MORE INTERESTING...