Hi,
I’d love to do that but I don’t think it’s possible: MapPress uses API libraries (places, drawing) which are not commonly loaded by other plugins/themes.
Google has unfortunately set up the API so that additional libraries can only be specified with the initial API script request (they can’t be loaded later).
By disabling the other plugin/theme’s API load, MapPress can load the API only on pages where it’s needed, and it can specify those libraries at load time.