Note that you cannot simply copy maps from your computer to a device or vice versa; the format is different. A gmapi 'file' (actually it is a folder) is meant to be used on your computer. An img file on your device can be made visible to BaseCamp with JaVaWa Device Manager, but it has to stay on the device (or on a memorystick in the folder 'Garmin'). Maps can be transferred from your computer to your device with MapInstall, but not the other way around.As for MapConverter: it cannot convert separate img files, but only complete file sets that comprise of several img files, a tdb file, and optionally typ/mdx/trf file(s), just like those that are installed on a Windows PC.
You don't have routes in nuvi, you have trips. No program on PC understands trips.
...My uses for Mapsource: ...3: I can create a multi-via route (Trip) and send it to the Nuvi...As for Basecamp...3: It can't create a multi-via route (Trip)...
...My uses for Mapsource: ...3: I can create a multi-via route (Trip) and send it to the Nuvi...As for Basecamp...3: It can't create a multi-via route (Trip)...I may be misunderstanding your point, but you can create multipoint routes with via points in both Mapsource and Basecamp. And you can send the route to a nuvi that supports the multipoint route. When you are familiar with Mapsource, the route eciting tools in Basecamp do take a little getting used to. But I have been able to successfully create and send multipoint routes from Basecamp to both of my nuvi's. I don't have any experience with the newer nuvi's with Trip Planner, but I think it should work for them too.
Once you have created and saved the basic route with a Start and Finish, highlight it in the navigation tree in the left pane. You can then grab the point insert tool (the pencil icon). Click on the start point on the map and you can "rubber band" to the first via point. Repeat this for other via points and you will have a multi-point route. :)