Some, like myself, prefer MapSource some million times before using BaseCamp. No need to invoke MapInstall for map build transfers.
It's also possible to use a IMG map in MapSource. No simple procedure but the best is to install Trip & Waypoint Manager v5 and replace the "TRIPWPT5.img" with the one you're interested in. Some complex maps and BlueChart g2 Vision can give strange results in map rendering when replacing the TRIPWPT5.img file with such content instead.

Example:
Code:
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