Limited Units Per Tile

[hemoglobin]

Is there a mod available for Civilization IV that limits to the number of units on a given tile to a certain number? Like something to what Civilization V did but more than 1 might inhabit a tile.

I'm not asking for it to be built, I was just curious if something like this was ever made.

 

[The_J]

http://forums.civfanatics.com/showthread.php?t=372716

 

[hemoglobin]

Thank You.