I have an E46 330d with MK4 NAV, I have updated my NAV to v28 and also have 2007-1 maps, but am getting frustrated with the limited 5 character postcode search!

I have heard rumours that there is a way of adding the full 7 character postcode search to the 2007-1 disc?

Does anybody know how to do this!

All help appreciated!

Thanks
David