How do I load new maps on my Mac with MapInstall?

[blippold]

I've got City Navigator and 1 Illinois topo (from GPS File Depot) loaded onto my Oregon 450.  When I downloaded several more topo maps from GPS File Depot, none of them appeared in the drop down on the second page of MapInstall (only City Navigator and the IL topo appear in the drop down menu).  Why don't all of the other topos I downloaded from GPS File Depot appear in the drop down menu so I can choose them to load into the Oregon 450?