[Frankie]

when it asks for the center, it isn't asking for the exact center of the gmap. you can make your gmap be 3 x 3 levels and still make the "center" the top left corner of the map. the "center" of the gmap is the level that will be named prefix_00-00.nw

like on Era, era_present_00-00.nw is unstick me. it's not in the exact center of the gmap at all. it's just the way you want to name your levels this way the main gmap level isn't some random combination.