Is it? I hope so. If not, is there any other radio software that will allow it?

I was going to work on this for the N-Gage, but then I gave up...
I could have another go;
I was trying to make a mask that ran over Radio and would tell it that the headset IS plugged in when it isn't. The signal would be pretty reduced but it's possible.

No. The headset is the antenna.

ya, the wired headset works as an antenna.
but you can activate speaker while listening to radio.

To get good quality reception, try and keep the wire as straight as possible. FM works really fine for me on N73. I can tune to all the stations.