16 is the limit for an install. I (likely a lot of others as well) have set up a folder of extra mods and just move mods back and forth as necessary. I have separate installs dedicated to 1)Cup related asphalt, 2)historical Cup, 3)open wheel, 4)GTP, 5)dirt and 6)rally types as well as another just for testing new things. I do the same thing to develop specific car sets and cut down on the number of car files within a mod.
