Hi.
From this thread, especially st5150 and steff32, I built this.
Use your existing cables (I actually purchased a MiniA to A USB cable to connect from my iriver)
All parts are very inexpensive and some simple (though a little fiddly) soldering.
Thanks again to everyone for their ideas.
Creeky
PS. I originally had US firmware 1.02, now 1.27 EU