Hi Dave,
This is the installation Guide on the Youchoos web site.
http://www.youchoos.co.uk/Index-Resource.php?L1=Guides&Item=DJM14XX
And this is the function list, order option and the ability to listen to the sound file.
http://www.youchoos.co.uk/Index-Shop.php?L1=Project&Item=GWR14XX
No connection but happy customer of sound for pannier, S15 and A3.
Luke