Read this
[Only registered and activated users can see links. ]

gmapbmap.img -> basemap
gmapprom.img -> first detailed map
gmapsupp.img -> second detailed map
gmapsup2.img -> third detailed map (only 5.00.60 and earlier)

If you can't see some of this maps then it is not unlocked correctly
When generating key with JetMouse, select software product "Garmin Mobile PC"