I think he could probably do with some Garmin help so I’m going to point him in the direction of this forum. He’s up and running, but he’s trying learn more about the process for working with MapSource on windows, which I dont know much about.
The “All in one Garmin map” http://dev.openstreetmap.de/aio/haiti/, which is already linked from
the Haiti map download page, includes a Mapsource Installer with the name OSM-AllInOne-HT-bmap.exe.
it is updated every half hour or so.
Just downloading and runing it on a Windows machine will install the map for use in MapSource.
It shows up in MapSource with the name “OSM-AllInOne-HT-bmap” in the map selection menu.