Here is a macro to add Mirror config to parts of selected folder in batch mode. Macro will check if any configuration with words mirror in it is there or not. If yes then it will skip that part model. If not then it will take create a mirror config for the active configuration with mirror body option and also add a delete body feature.
The mirror bodies will be created across Front plane but you can change the plane name as required based on your model templates.
The macro can be improved further, so all suggestions are welcome.