On my Rosen units, the iGo directory is named "nng" (not "igo8") and the iGo executable is named "nngnavi.exe" (they do also have touch.cfg and device.nng files in the root directory).

I think your main issue is that the iGo directory and executable are not named properly. On my particular unit, the maplaunch.ini file isn't even used - probable left over from an older version of the radio - or they use the same GPS cards for multiple radios - not sure if it's really needed in your case or not. But I would set it up exactly as I show above - and make sure the iGo directory is named "nng" (instead of "iGO8") and the iGo executable is "nngnavi.exe".

Unfortunately, these Caska units don't seem to allow you to modify the Navi paths - you have to use the names that are hardcoded (nng and nngnavi.exe).

Don't worry about customizing the [bmp] section for now - it's probably not even used. Just put it there just in case though (again, as I show above).

Let us know how you make out.

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