Folks: Just received my new 8800 from work. One feature I've been really looking forward to is the ability to listen to wav voicemail files that have been sent to me from our unified messaging system. Unfortunately, for me at least, the wav files always play back via the speakerphone and I have to quickly activate the handset. Does anyone know of a way to set the default playback to be the handset? I'd rather the world didn't have to endure my dull voicemails.

I prefer not to use a bluetooth or tethered headset.
I'm wondering if some software other than the default playback software will accomplish this. Any info is welcome. Many thanks!