Garmin Map- From a MP file I need to generate a IMG file

Hello, we need from a [login to view URL] file which is 70mgs we need to convert it into a IMG file so a Garmin GPS could read it but the thing is when we export it using the software mapedit 1.0.66.7 we loose the routing capabilites, We need to export it but keeping the routing capabilities of the map. You will probably need to have a GARMIN GPS unit to complete this jop. We need to have the IMG file exported and the routing capabilities continue working (the map already has routing). We also have the source IMG file working with routing capabilities but we are not allow to use it with the "publishing"name it has as developer, we need to change that name on that IMG file, that is it.