Got this all sorted and up and running, turned out the cars previous owner had already bought a replacement glovebox to get rid of the phone cradle, removed the old Bluetooth unit under the seat, put new unit under the radio above the ac controls.
I had a few issues due to the fact my battery shat it's self during the install. Once I had a new battery it sorted it's self out.
There wasn't any need to swap any cores or anything, bout the new Bluetooth from a member on here.
Very happy with it.
Only thing now is the arm rest iPod dock doesn't work, any ideas gents?