Same problem here as stated before:

Map displayes fine in the patched BaseCamp and Mapsource versions, but does not show on my Oregon 450 unit (latest firmware). After copying the file over and run the Fast IMG unlocker (v1.5) I at least get rid of the "locked map" message on the Oregon, but it will still not show.
There must still be something inside the file that tells the latest oregon firmware that it's dealing with a copy. Has anything been developed yet to counteract this (besides downgrading ofcourse, which is something I rather not do)?