I've followed your instructions and I can confirm the the new 4Gb SD work and that the bootloader chanhed to 5.5128. Now I'm downloading the europe maps (it takes some time since all the rapidshare/hotfile/megaupload/fileserve link are dead and there's only filefactory...

As soon as I've downloaded the Europe Map and put them in a directory Europe I'll let you know.

My device type is 4N00.012

Thanks very much indeed...