Lo-line satnav disc/question

[andy]

Does anyone know or can give recomendations
My Zt-t has lo-line sat nav, with the original 2003 disc
I am thinking of buying a new disc - there appears to be a large choice on ebay and recomendations would be welcome
My main Question is whether it is possible to get a disc that enables the system to do post code searches/directions, as often I dont know the road/local area name but I have the post code - anybody done this ?
Andy

[madone]

My original disc was 2003 also for my Lo Line. The ones produced since have post code access but only the first 4 figures. They do not yet come with the full post code, something to do with data storage space on the disc I believe.

[MN190]

Have th Lo line fitted and am using a BMW 2006 disc with no problems. It does do Postcode entry for some areas but not the full postcode function