Freshfone play mp3 whilst calling agent

I'd really like to have the option to play an mp3 at the same time as calling an agent. This will mean that the customer no longer hears ringtones but music instead. Currently we only have the option to Call Agent, Call Agent Group, Call Number or Jump To. Being able to Play Music AND Call Agent would mean that customers would not have to hear an American ringtone when outside the US whilst their call was being connected.