I've never owned one, but try making a Ringtones or Alerts folder on the SD card and putting them there (then restarting). No guarantees, but Android used to work with that arrangement.
Probably already know the answer, but I was wondering if there's a way to add my own audio files for alerts and ringtones to the GW3? Any info on how to do this, if its possible, would be appreciated.
Thanks!