well seems no one else will do it i did. heres what you need to do to remove the reversing beep and the reversing beep only.
To start off with sick your head under the steering collum,the box you are looking for sits right up on top of the steering collum on the right hand side (above your right hand leg when your sitting in the car).
The box your looking for looks like this
In the picture above the white plug faces the firewall.
unplug the plug from the box and pull away some of the insulation tape,proceed to cut the RED wire only,this is the trigger wire for the reversing beep.tape the live end up and plug it back into the box and your all done.
Jack