Greetings, I have a GPS where the maps are locked to the fingerprint of the original 4gb microSD card that came with the unit. I am trying to update my maps, but the newest update is 5gb, about 1.5 larger than the card will accept. Because the card is locked via some kind of DRM, I cannot simply copy the data to a larger SDHC card and move on. Is there a way to change the digital fingerprint of the new larger SD card so that the GPS can actually use the updated maps? I'm going on a pretty long journey in April and I don't want to end up lost because my outdated maps haven't corrected for new construction and what not. Thanks!