@ Some problems calibrating the maps initially, using Lat/Long and WGS 84 projection .

You have to use the input data from map notes for calibrating - coordinate format, spheroid and projection only!!! After calibrating you have to save a project as Lat/Long and WGS 84 before converting to JNX.

@ I have around 10 maps I intend to convert. They appear as individual jnx files in the device and can be separately turned on and off but I might merge them when they are all done if I can figure that out. Also may be useful to have different levels of detail and different zoom levels but I dont think MAPC2MAPC does that

If your map is not overlapping and have the same scale you may to use the same Product ID and Product name. Cropping of borders is required! In this case all map will be under the one checkbox in list of map. If you use maps with a different scale I recommend to use Product ID and Product name separately for each scales. It is better than the one multilevel JNX because you can play with appearance of map on screen through device menu.