Maps - Game Limits

What is the game's limit of:

-The total number of default maps & mod maps installed/loaded into the game's planet "Map Filter"?

-Total number of "Saves" (cities) that can be "Created" ?

-Total number of cities that can be created using the same map?

 

Posting by the XL Nation Saff (Pamascus27) at
http://xlnation.city/resources/ultimate-map-pack-of-real-world-maps-boston-added.796/

"ATENTION: If you click on a map and nothing happens it means you have too many maps using the same base map, thus not making slots on the world sellection screen. If that happens simply take off of your mods folders your maps and save them somehwere on your pc and leave the map that wasn't appearing. Now the map that wasn't appearing is now sellectable and if you whana play one your old maps simply put it back on your mods folder."

Maybe someone could explain more about the term "slots".

 

Not sure what this mod does exactly.
The term "slots" again.

http://xlnation.city/resources/add-extra-map-slots.378/

Work in XXL?

 

w/forum search keyword "slot"... good information here, but these are references to XL issues and not XXL:
http://xlnation.city/threads/no-free-slot.1391/#post-7158
http://xlnation.city/threads/anchorage-ak.1975/#post-12422

So..I'm guessing that "slot" refers to the 70 or so "land_xxxx_0#.pak" files located in the paks folder.
And..that a mod map uses one of these slots for a newly created map (hence the trees in the water).
If so, a user knowing the "slot used" for a particular mod map would help with managing new city creations and avoiding "no free slot" situations. Seems like I've seen this information included in the author's desciption on a just a few map download pages.