So you have purchased a modified Garmin Data Card with a 2GB NAND circuit, as described in this post here?: [Only registered and activated users can see links. ]. Unless you have a way to directly access the nand, you would still have to send an image from your computer using Mapsouce or BaseCamp/MapInstall. In that case you need the MS version from Post #1. Read the instructions there and also in [Only registered and activated users can see links. ] for using MS versions and gmap folders. If as Roger guessed, you have a 276C, the maps from Garmin come on a DVD for your unit, but you should also be able to do the install as described in Post #1 and the tut.
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