Using Google Maps

I have installed and tested the Google Maps. It does not appear to provide the functionality I require.

The maps will be used on each site as an individual store locator, and I do not want the store managers to alter the appearance of the post.

That means, I need to be able to use the shortcode to insert the map in a post that the site admin does not have access to (I use a plugin that restricts access to certain categories of posts).

I would like the site admin to be able to edit the location of the map, but not the size or other layout formats.

Is there a way that this map plugin can do that? Alternatively, I must use Pazzey's Store Locator plugin.