If you download a bunch of maps, the creators often forget to add the number of players that can play on the map to the map name. This makes it hard to use the already limited map search functionality in the game.
Example: The map "Agnesi Simulation" can be played with at most 6 players, so it should actually be called "[6] Agnesi Simulation"
If someone else was bothered by this as well, here's a small Python script that renames all maps in the way shown above. To use it, simply drop the script file into your "path/to/yr/Maps/Custom" folder and execute it using "python rename_maps.py".
rename_maps.rar